My kids are doing really cool science fair projects.
My sons’s is relevant to music.
He thought the garbage can speaker was hilarious, so he’s making speakers out of various things to see what they sound like.
Here’s one made of plate glass, looking from behind - also did thin plywood, sheet steel, sheet plastic, and cardboard.
Cardboard:
Cooooooool:-)
Tried it on the a bath tub? Awesome!
You’re gonna need a truck for the school run;-)