If neon doesn’t float your kid’s boat, how about these glitter pastel egg delights? If you can find duck eggs, go with those. The shells are much more fragile than chicken eggs, but they’re great for this project as they’re lovely and white – good for pastel!
Sit it in the egg carton that it came in, glitter side up, for about half an hour until the glue dries. Once it’s done, don’t touch it too much because the glitter will come off pretty easily.