I saw this cute idea on a blog a long time ago (sorry, I can't remember where) and I had to make it for the kids. Ella had fun walking around in the backyard collecting nature things to put in her nature box. We did it once last fall, but we were able to find more colors now that it is spring time.
materials:
egg carton
paint
paint brush
educational benefits:
color matching (visual discrimination)
observation (science)