Check out this neat video of a high altitude balloon launch. What makes this launch unique is that they sent up a Coors Light beer can in front of the video camera so you could watch the ‘cold activated can’ turn blue as the temperature drops. There are probably easier ways to test if the cans work, but they wouldn’t be nearly as fun to watch.
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.