8th grade is old enough to do just about anything. I like to do big memorable projects with my kid where we both have to learn some things along the way. I’d build a go kart at this age, or some other electric motor driven vehicle. I’d think it would span a few months depending on time dedicated. And covers mechanical, fabrication, components and even some programming if you want to tune it yourself.

Also, I like to reinforce the concept of “dreaming it up”, tell my kids to think of a thing to make and we break down the steps we think are needed to build it. At first, it’s like their imagination wasn’t big enough. They’d have an idea and I’d show them how we could build it pretty easily. Now, it’s gotten to where they know the skies the limit and anything of kind of possible so they start big and then work their way back down to a realistic scope of features. All to say, ask your kid what they want to build!

• atmosx

  yesterday at 11:13 PM

  This is a great way to teach long term planning and goal setting.

GNU radio is an awesome signal processing toolkit. You can use it to take signals from a cheap RTLsdr, or even a microphone, and make new virtual instruments, radios, etc. Long ago I was interested in aircraft navigation aids, and was able to throw together a receiver for the local VOR transmitter, which showed me on screen where I was relative to the transmitter.

You could build a sonar system, listen to ultrasound, or almost anything you can imagine, thanks to Moore's law and the massive amount of compute we have these days.

I loved doing chemistry experiments and demos at home as a kid. I had books like the Golden Book of Chemistry Experiments [1] but this is a modern guide that I would gladly recommend:

Illustrated Guide to Home Chemistry Experiments: All Lab, No Lecture by Robert Bruce Thompson

https://www.amazon.com/Illustrated-Guide-Home-Chemistry-Expe...

[1] https://library.sciencemadness.org/library/books/Brent_GBC.p...

Crunch Labs of Mark Rober https://www.crunchlabs.com/ https://www.youtube.com/@MarkRober

If he likes video games, we’re hosting a big game jam for middle and high schoolers next weekend.

It’s free and nonprofit. There are 60 locations. Maybe one is near you?

https://counterspell.hackclub.com/

• nogridbag

  today at 2:53 AM

  hi, I waited for this thread to die down and reach the second page before I posted this because I love this topic and didn't want it derailed with a sensitive issue. I didn't realize this was restricted to school age kids and wanted to sign up as I needed some motivation to start on a game. But I reached the pronoun combobox and was legitimately confused!

  I used to have a passion for UX and read books like "Don't make me think" and here I was stumbling with this silly field and didn't complete the form. Instead I was googling about pronouns to see if I should select "he/him", "he/him/his", or "He/Him". I didn't even notice there was an "any" and "other" value until I started writing this comment!

  Hope you don't mind the question. This is a serious Q as I'm responsible for the UX of a public facing application and might at some point be required to add this field to our pages. I find it odd and kind of against UX best practices to make the field required. And presenting so many similar options "made me think" which used to be considered a bad practice because it's an obstacle to users completing a form. I now realize the target audience is school age kids. Do they automatically know what to select? I'm a xennial that somehow went into some time freeze spending every second of the day raising two kids with little time for social media. So please excuse my ignorance.

• linsomniac

  yesterday at 11:22 PM

  HackClub is very, very cool. My son just got a envelope from you a couple days ago, Zach. Keep up the good work, and see if you can slip in a couple extra of your extremely cool stickers for me next time. :-) (Currently rocking Hack to the Future on my laptop)

Buy a Bambu Lab A1 Mini 3D printer. They're amazing. Then look at examples of what you can do on Youtube. Amazing! Kids nowadays have it so good.

• linsomniac

  yesterday at 11:19 PM

  I've had an Ender 3 for 5 years and just got a Bambu P1S, and it's amazing how far things have progressed. The Bambu is just a workhorse, I currently have it printing Christmas ornaments to give the extended family. Where the Ender I would shy away from things unless I REALLY needed them, because I knew I'd have to spend time screwing around, the Bambu basically just works.

  I bought the Ender for my son, and he put it together and helped me do some mods to it and print some things, but after about 3 months he never touched it again. Just gave it to his school when I got the Bambu.

  The A1 seems to be quite a capable little printer.

  Beyond just printing things you find online, learning CAD is a really fun way of turning ideas into tangible objects.

  • radicalbyte

    yesterday at 11:26 PM

    Same here. Now I have an A1 + A1 mini too. It's amazing. This is what I dreamed of when I built my first RepRap. I did get me Ender 3 working eventually but the print quality isn't as good as any of the Bambu printers and it's super slow.

    The new CoreXY Prusa One is also a very good buy when it comes out but the A1/A1 mini in particular are just such a good deal at the moment.

• gtm1260

  today at 12:20 AM

  I feel like its best to have a project first where you need 3d printing and then buy a printer. Just getting a printer in and of itself is kinda boring after finding some random crap on thingiverse and printing it out.

If I had kids, I would probably subscribe to KiwiCo (https://www.kiwico.com/us/store/cp/12-plus-years-old).

Lego?

Unfortunately, my limited (geographically-constrained) contact with my nieces and nephews has severely impacted my ability to influence them towards technology. :(

Exposure is one thing that is helpful, but in the end, you have to find something that your son is so enthralled with that he wants to pursue it on his own. It begins with curiosity about something, of course, but ultimately requires him to develop the skills and then the confidence to where he wants to begin doing things on his own.

The problem is in the things that parents subject their children to that actually drive the children away from those things... like piano lessons! (I say this as a pianist that has taught many children over the years, and it's obvious which kids are being forced.)

What does he like to do?

• supportengineer

  today at 12:30 AM

  KiwiCo's Tinker Crate is one of the best parenting moves I ever made. I thought the older kid would like it more but the younger one really took to it.

Around that age I built a trebuchet. Did calculations, got some plywood and building lumber, etc. Had a lot of fun chucking water balloons down a hill.

• serjester

  yesterday at 11:31 PM

  Second this - in our case we had a local competition. Awesome experience.

Perhaps it's too simple, but I like https://elenco.com/snapcircuits/

• hex4def6

  yesterday at 10:18 PM

  My kiddo has a couple of those, and I'm still in two minds about some of the choices that they provide in those kits.

  It feels a little like "Follow these instructions exactly" without requiring understanding in a lot of cases. For example, the music IC doesn't have any of it's terminals labelled.

  The same with the transistor; it doesn't seem to explain exactly why you'd need to use it, why you'd need a resistor on the base, etc. On that note, It's also possible to potentially damage stuff if you just try to experiment without understanding.

  I feel like they could have made some of the parts a bit more flexible -- have current limiting resistors built into the LED & transistor units for example, provide point-to-point wires rather than rigid 1/2/3 unit connectors, etc etc.

  • supportengineer

    today at 12:27 AM

    Had these for my kids. It is confidence-building either way. And it is likely to spark a lot of questions like "What is a transistor anyway?"

    I certainly would not WITHHOLD Snap Circuits from a kid because they might not know what's inside the IC.

• TheMagicHorsey

  yesterday at 9:52 PM

  Second this. My daughter is in 3rd grade and loves these.

I soldered one of these with my 6 year old: https://thepihut.com/products/3d-xmas-tree-for-raspberry-pi. They seem to be out of stock, but maybe you can find them somewhere else.

Fun, quick project. With my kid, I healed the iron and they held the solder. I’m guess a 13 year old could do more (or all) themselves.

Then there are options for tweaking the program, like different patterns, a “count down” to Christmas, etc.

Adafruit has loads of projects and kits like TV-Be-Gone, Circuit Playground, EdgeBadge and others. They're suitable for a range of ages and experience levels, usually come with lesson materials and are generally pretty affordable.

I believe SparkFun has a similar ecosystem of products and projects as well.

I'm not affiliated with either of these companies.

Aolean harp! I'm planning a workshop for kids around this now: build the harp & resonator however you like (two flower pots with a piece of fishing line in between for example -- more ideas here: https://www.homemade-dessert-recipes.com/aeolian-harp.html) then add a contact mic to the resonator and do some simple digital processing (delays and phase shifts) on the waveforms to demonstrate signal arithmetic and the basics of acoustics.

My father is an electrical engineer. Growing up, he had countless components in the basement, including a whole slew of 7400-series DIP chips, as well as a bunch of (powered) breadboards and spare wire. In highschool I had so so much fun building things from scratch - I recall building a basic adder by drawing out the truth tables and doing boolean algebra to come up with the circuit diagram, eventually evolving it into a more fully-fledged calculator. It felt (and still feels) like magic! Most of it was self-directed, though I certainly got his help in a lot of places.

I think sort of "choose your own adventure" projects like that are great, and they also force you to really understand everything you're doing. You can also scale the scope of the "project" to whatever you want; it can even be a sort of iterative process. More importantly (imo) you're left with a bunch of components that he can tinker around with endlessly :)

• LVB

  yesterday at 10:49 PM

  I so miss the basements of my midwest youth and early adulthood. They were the place for projects. I built so much. My west coast home since 2010 doesn't have a basement, and we've not much interior space for projects (esp when you're talking construction, tools, soldering and such). My spouse is stickler about the inside staying nice, too. The garage is the alternative, but it's so inferior. There's a car there, it's cold, etc. Oh for a basement...

  • quadragenarian

    today at 1:50 AM

    Living in the Northeast, my basement flooded last winter and now my radon levels are through the roof. However, I can't mitigate them because of the French drain I have there! So basements aren't always that great, at least in my area.

Rebuild a used car. They can drive it in 2 years when they get a learners permit.

I'm a really big fan of the more modern way of doing things.

A lot of old school maker projects are fun, but they're also basically E waste making kits now that phones do almost everything.

Not having a bunch of low tech gadgets laying around is really nice, they can easily become the biggest clutter challenge in a space, the same way paper used to back when more people still used it for things other than books.

Building a small solar energy system is fun and easy, and also practical.

3D printing is fantastic.

Meshtastic has a lot of DIY and learning potential and is like the lite edition of ham radio. What's really cool is that range testing gets you outside.

Maybe design something together with JLCPCB and have it made(Leave off any through hole connectors and solder them yourself for both fun and pretty decent cost savings).

• rawgabbit

  last Sunday at 9:49 PM

  Any solar energy kit you would recommend for a hobbyist without breaking the bank?

  • eternityforest

    last Sunday at 11:43 PM

    The prices change every 5 minutes for sales and such, but there's generally always a ton of 50 cents a watt solar panels on Amazon.

    Permanent installs that work unattended are slightly scary and have to be done right so something doesn't leak or start a fire, but the portable folding panels are usually similarly cheap.

    You could get one of those plus a charge controller and LiFePo4 for not too much.

    Everything still needs to be done carefully though, and unfortunately almost all cheap charge controllers have a ton of idle power draw, they're kinda crappy compared to the tech built into a random cheap solar generator, I don't think you can make anything as nice as a commercial generator for cheap.

    Most the DIY education kits for kids type stuff seem pretty crappy too.

    An ESP32 module with onboard lithium charging plus a USB-C folding panel has a lot of possibilities though, if you have any projects ideas that could be done with such things.

    • thimkerbell

      yesterday at 11:07 PM

      Youtubing might be good for initial exploration, stuff maybe like (beginner-friendly dyi solar) https://youtu.be/adFGmOlDM-Y

• last Monday at 6:56 PM

Buy a $20 RC car off Amazon and replace the radio receiver with a raspberry pi for a quick and dirty driverless car platform. Might have to do some surgery to reuse the motor drivers or you might have to add your own, but it's generally not too bad.

Fpv, my kid didn’t care about the sdr rtl plus it doesn’t actually do any interesting frequencies. Everything interesting is 1ghz and above these days

For the drone I just bought the parts over time and one day he asked if he could put it all to put it all together. It was a bit of a bitch debugging his mistakes but I’m glad he took an interest and applied himself

FIRST Tech Challenge

13 year old can do almost anything. Only problem is ... scope, I guess?

Like, I was making games in Visual Basic. Made a little Tyrian clone. It had total of two levels :D

Build a cigar box guitar.

Here's my method: https://jsnow.bootlegether.net/cbg/cbg.html

Take a look at what these guys do:

https://circuitmess.com/

Raspberry Pi CAN Bus trains kids in reading diagnostic logs

https://www.autopi.io/blog/raspberry-pi-can-bus-explained/

This is a great way to get Linux experience. One student used these skills to work on Medtronic GI Genius via YOLO AI.

Not quite the same, but if you've a leaf blower, then making a hovercraft with a couple of pool noodles and a circular piece of plywood is pretty cool (and a lot of fun).

BBC Microbit project kit. Awesome stuff. It's used in secondary schools here in NL to teach kids CDT.

Custom handwired (maybe with amoeba pcbs to help) keyboard, there are a lot of designs out there.

diy telescope.

You can get a mirror set very cheap on ali, eg https://www.aliexpress.com/item/1005005098614936.html

You'll need to buy an eyepiece or two, and hardware, bolts, etc, but everything else can be made or 3d printed.

I designed and made, with my kids, a 76mm 'cheapscope' using PVC pipe, 3d-printed mirror-holder, spider. focuser and camera-tripod connector, here: https://imgur.com/a/cheapscope-4KtPgoN

I meant to post the 3d-print designs but haven't got to it, let me know if you're interested.

For sure it's not the best scope (or design) ever (and the 3d prints warped a bit), and no phone/camera eyepiece mount so the pictures are shaky, but it works, it was fun, and opens up a new world(s).

Modular synthesizer.

8th graders need to make noise.

Good luck.

[dead]

[dead]

Sometimes a 13 year old kid just wants to be a kid. I know because I was robbed of that, thanks to the adults in my life growing up. Let your kid discover whatever it is that they are into, on their own.

• ugh123

  yesterday at 10:52 PM

  Are you saying just let them figure it out on their own?

  I prefer to give my kids opportunities in things they wouldn't otherwise have known about, or had the resources to discover. They can then decide if thats something they want to go deeper on.

  This notion of "let kids be kids" minimizes their development needs and exposure to important learning experiences.

I think 8 grade is too old to make silly toys, and time to do some serious stuff:

1. Carpentry project

2. CNC machining project

3. Microelectronics: assembly from ready parts

4. Drone or aviation related project

if he is into computer stuff, just teach him how to hack computers and websites, the pentesting stuff.