My grandfather built a panel of light switches from WWII surplus for my dad as a toddler, and my dad built a panel of buttons connected to indicator lights for me. So now, I’ve built the Model C, a set of light switches for my daughter. It’s easier than holding her up to play with the house lights.
These switches are connected to white LEDs, powered by two C batteries. The switches are hot glued to holes drilled in a board, covered with plastic containers from an art store.
I used the LED wizard to figure out what resistor to use. Burnt out LEDs stink, literally.
Next up, the Model D, using programmable LEDs in a high chair.
[UPDATE] The lights are in holes beneath translucent plastic containers. I put some cheap plastic Easter eggs inside, and voila! Now in color!