I'm trying to figure out how to make a kaleidoscope with kid-friendly materials. Plus they have to be cheap, simple to assemble, and fuctional. So far, my best combination is:
Paper towel tube
Eyepiece made of construction paper
3 rectangles of glossy clear plastic that is meant for covering paperbacks, rubber banded together and inserted in the paper towel tube
Small plastic petri dish
Sequins
Glue dots to hold the petri dish in place