Wooden Stegosaurus Puzzle Organic Dinosaurs for Kids, Boys and Girls Waldorf Childrens Play. $18.95, via Etsy.
Leonardo Sticks from German toymaker Grimm's Spiel & Holz allow children to experience the brilliance of da Vinci's design and to experience physics in a fun and colorful way. Build bridges and domes with these colorful wooden sticks! From Bella Luna Toys.