Feature:1. Doodling robot uses the vibration and spin generated by its motor to create works of art.2. Reptile robot, the reduction motor is used to drive the arms to rotate interactively, so that the bug can crawl. Different crawling effects can be achieved by changing the relative angles of two interacting arms.3. Balance car robot uses gear reduction drive, keep balance under the gravity.4. Learn basic principles of simple circuit, motors, mechanical and engineering, robotics.5. Make learning more fun, stimulate kids curiosity and creativity.6. Safe and non-toxic materials, nice gift for kids.7. Clear and complete science guide booklet for kids to follow.Specification:The 3pcs DIY electric robot kit are educational project for beginners to learn circuits and robotics. Create electronic kits with the motors, make learning more fun, stimulate kids curiosity and creativity.Features:Doodling robot uses the vibration and spin generated by its motor to create works of art.Reptile robot, the reduction motor is used to drive the arms to rotate interactively, so that the bug can crawl. Different crawling effects can be achieved by changing the relative angles of two interacting arms.Balance car robot uses gear reduction drive, keep balance under the gravity.Learn basic principles of simple circuit, motors, mechanical and engineering, robotics.Make learning more fun, stimulate kids curiosity and creativity.Safe and non-toxic materials, nice gift for kids.Clear and complete science guide booklet for kids to follow.Specifications:Material: ABSBattery: Doodling robot: 1 x AA battery (not included) Reptile robot, Balance car: 2 x AA batteries (not included)Color Pen: Color randomItem Size: Doodling robot: 125 * 75mm / 4.92 * 2.95in Reptile robot: 100 * 90 * 50mm / 3.94 * 3.54 * 1.97in Balance car: 110 * 85 * 70mm / 4.33 * 3.35 * 2.76inPackage Weight: 240g / 8.47ouncesPackage Size: 275 * 165 * 50mm / 10.63 * 6.5 * 1.97inNote:You have to assemble it by yourself.Packing List:3 * DIY Electric Robot Kits3 * GuidesPackage List:3 * DIY Electric Robot Kits3 * Guides