The cube puzzle maze is an ideal intelligent development toy and stress releasing tool. The puzzle box is made of environmentally friendly plastic, non-toxic and odorless, parents can rest assured. Transparent PVC isolates the baby from contact with the ball. Avoid babies eating small balls. 6 faces represent the 6 levels of the game. The difficulty is increasing. The cube puzzle box can cultivate your child's imagination ability, hands-on ability, observation ability, and cognitive space. Ideal birthday or Christmas gift for your kids and friends.3.15" L x 3.15" W x 3.15" H