No battery or other power source needed, just put them under the sun to obsorb energy from the sunshine to make them vibrating and move
Both specially designed and eco-friendly , this product is also an excellent teaching tool to let your students to know some basic knowlage about solar energe A fun demonstration of solar power.
Specifications:
Solar energy provide with motive power, Built-in mini motor engine Simulation design.
Size:2mm*19mm*13mm
Color:black
Net Weight:5g
Unit Packing Gross Weight:20g
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Docooler Solar Power Energy Cockroach Fun Gadget Office School toy gift present
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