Practice matching colors with this FREE printable! Preschool color sorting and recognition activity. I would hang this on the wall and have just one matching picture attached with velcro for the kids to mix and match for color recognition!
Could also connect a bunch of locks and put all the keys on a key ring. Lots of pictures of latch, lock, etc ideas for montessori type preschool. This lock one could be made with 2 boards, some o-rings, and some locks from Dollar Store.