Nice toy & gadget to place in office or home to scare and have fun with your friends and mate.

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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