A little more about
Scratch, the programming language I posted about earlier.
Connecting Scratch to the physical world
In the workshop, I made a "game" controller from 2 cardboard circles, metal tape, alligator clips, and a
Pico board.

When I squeeze "C" the aluminum tape on the top and bottom circles touch. The clips send a signal to port C on the Pico board. The board is plugged into the USB port on the laptop. Scratch reads that touch from port C, and I have programmed the froggie in my game (see previous post) to move to the right "10 steps" for each tap.
I played with other projects people had made, employing the light and sound sensors, the button and slider on the Pico board. Covering the light sensor with my hand caused an nighttime animation on a picture of a landscape.
( See other controllers kids have made, and more info... )