Egg Carton Game

I made this game for A when she was 15 months old.  I cut holes in the bottom of an egg carton, and stuck clothespins in each hole.  A would carefully take each clothespin out of the hole and then try to put them back.  She played with this toy a lot and if I bring it out, she'll still play with it.  I remember her having a harder time putting the clothespins inside the holes than taking them out.  Now she's a pro and can do both quite easily.