Transparent Design. bus view the gear inside, help the child to know the mechanical concept earlier. Gear driving effect. Enhance Brain Development and build a Child’s Curiosity for New Things. Different Color helps child cognitive ability. Made from heavy-duty plastic, the toy has no small parts to it so that children can enjoy it. To operate a toy car you need to have 3 x AA batteries (Not Included). Made from heavy-duty plastic, the toy has no small parts to it so that children can enjoy it. 360 Degree Rotating Transparent Concept Racing bus with 3D Flashing Led Light . Multifunctional, colorful lighting, clone gear mechanical system, awesome sound effects. Transparent Design. bus view the gear inside, help a child to know mechanical concept earlier. Gear driving effect. Enhance Brain Development and build a Child’s Curiosity for New Things. Different Color helps children’s cognitive ability.