This is a DIY solar car prop, adopting sturdy material, safe to use, simple to assemble, which can exercise students hands-on ability. A good and practical small science experiment prop, which can help them improve science thinking ability. Features -Color:Multi-color -Material:Metal, plastic -Size:11.50X6.50X5.50cm/4.52X2.55X2.16in - The hardness of the material can keep it not easy to deform under normal wear. -The solar car model is simple to assemble, and can stimulate students hands-on ability. -This DIY solar car model is safe to DIY and playing. You needn't worry about its safety. - Characteristic and with DIY design. Simple and generous design, smooth in lines. -The good workmanship of our DIY solar car model will bring you a . Package list: 1 x bottom board 1 x bracket 1 x electrical machinery 1 x solar panel 4 x wheels 2 x axles 1 x machine cover 1 x rubber band 1 x pulley (size S) 1 x pulley (size L)