and dried beans are soooo inexpensive! We use noodles for playing inside. John has a big plastic box full of different sizes and shapes of noodles that he digs in.
Another great activity for Stephen, and probably Z too, is water and medicine droppers. I let John have a small glass measuring cup, some bowls, scoops, spoons, and medicine droppers. Add a little food coloring to make it interesting. And let him pour and drip the water. The pouring is good for hand-eye coordination and the droppers help develop the writing muscles in their hands.