Made by Joel DIY is a fantastic blog, and here he shows how he made a Baby Toy Slot Box. He made some round circles out of scrap wood, sanded them, and cut a few slots into a shoe box. Then his older kids painted the coins with some non-toxic paints. The baby loves putting the coins in, then opening the box up to see where they went!
Shoe Box Theater - We have a couple of shoe boxes around right now. Might be fun to make one of these with a basic landscape in the background, and then change out the characters and scenery on occasion, using toy cars, play insects, play animals, etc.