Jazzmin's Mechanical Physics Fun

I bought, eh-hem, Santa brought Jazzmin some activity kits he knew she'd like - one of which was this physics kit:We hadn't gotten around to using this "Physics Discovery" so I brought it with me to Brenda's over Easter weekend. Just thought I'd show you a couple of the projects Jazz and Aunt Brenda put together. The first one utilizes gears to move the "windmill blade(s)" around when the string is pulled. The other is a project demonstrating velocity - it was like a stationary sling shot.