This item is a DIY solar car teaching prop, adopting sturdy material, safe to use, simple to assemble, which can exercise hands-on ability. A good and practical small science experiment prop, which can help them improve science logic thinking ability. Features -Color:Multi-color -Material:Metal, plastic -Size:11.50X6.50X5.50cm/4.52X2.55X2.16in -Made of sturdy metal, plastic material, practical and convenient for longtime use. -This solar-powered car DIY material can fully show the characteristics of solar power. -Easy to operate, which can make solar-powered car experiment learning more efficient. -The Solar Vehicle Model Making Material is conducive to improve academic performance. -It is a wonderful toy for scientific experiment teaching prop to understand solar experiments. 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)