The kit includes a solar panel that powers the positive and negative cables. Children will build a real working solar-powered motor that serves as the motorized foundation for each robot model! *For best results: use outdoors on a sunny day! Features: 190 PIECES FOR THE ULTIMATE CUSTOMIZATION EXPERIENCE: 12 robot blueprints are included, but children are free to create their own original robots from their imaginations! Use the instructions to master robot-building, then encourage them to make their own from scratch to test the limits of their creativity! Great for little builders ages 8+ Specifications: Dimensions: H:31.0 x W:6.5 x D:20.0 cm Colour: Multi Model Number: 6000370