The Weewooday 4 Pieces Bird Training Toy Set is designed to improve birds’ intelligence and create more fun for them. The set includes a shopping cart, bird basketball gym toy, bird stacking toy, and parrot skateboard. The shopping cart has wheels and is made of alloy and plastic. The bird basketball gym toy is made of wood and plastic. The bird stacking toy is made of acrylic and wood. The parrot skateboard is made of matte-coated plastic.