Description: 【High Quality Materials】: The balloon cart kit is made of ABS plastic. Eco-friendly materials are non-toxic and tasteless, so babies can play safely. Use aerodynamics to promote environmental protection and energy saving without using batteries. 【Safety】: The product has a compact structure, is drop and abrasion resistant. The entire product has rounded corners that do not hurt the hands of children. Both your child and baby can play safely. 【DIY Educational Toys】: Learn science and physics. Children can learn science and physics with exquisite DIY toys. While playing, you can play on the principles of aerodynamics to push the car toy. .