Heathkit was the original electronics kit company, and their kits were extremely popular after World War II. Their first popular kit was an oscilloscope, which sold for around $50 (a lot of money at the time, but a bargain compared to available commercial oscilloscopes). The main selling point for Heathkits, was that if the purchaser bought a kit, and built it themselves, they would be more able to troubleshoot and repair issues.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.