Clapping games require a lot of brain power! Simple tunes, like Pat-a-Cake, are perfect for infants. More challenging ones, like Miss Mary Mack are great for preschoolers. This website will get you started on some hand-slapping fun!
DIY Turn PVC pipes into a playground musical instrument. I wish this had the instructions with it, but I might be able to figure it out. This might even work as a service learning project for my daughters school.