DIY Electric Project Kits Robot Construction Sets Worm Toys
Product size: 10*12*5 cm (3.94*4.72*1.97 inches)
Suitable age: over 5 years old
Principle: The chemistry energy in the battery converts into kinetic energy of the motor,which drives the yellow wheel to move.
Note: The price is for 1 set. The batteries are not included.
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