Rubbabu, Aniwheelies Monkey Rubbabu, Aniwheelies Monkey All aboard the sustainable toy express! Made from 100% natural rubber foam, guaranteed to delight your child's imagination and leave a minimal impact on the environment. You can feel safe knowing your child is playing with a toy made from completely natural materials such as rubber foam. These are sustainable toys because we can collect the rubber sap off the tree for about 10 years. All aboard the Sustainable Toys Express!