1. Cultivate children's interest in learning and thirst for knowledge, which helps to improve children's academic performance. 2. The scientific knowledge in the small production can be used for inventions, mathematics, physics and chemistry learning lay the foundation. 3. Improve children's innovative awareness and ability, let children win at the starting line, and become more competitive in the society. 4. Strengthen the training of hands-on ability, so that knowledge is no longer "on paper." This is a DIY kit; assembly required by yourself. Power Supply:4 x AA battery (Not included batteries) Color:Wood Color Material:Wood + Electronic Components Package Contents: 1 * DIY Car kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.