DIY Electric Butterfly STEM Kit jeep and Math based toys geared

and Math based toys geared towards learning

1 X Electromagnet

After assembling the product

1 X Hand crank generation model

it is durable and reliable

DIY Electric Butterfly STEM Kit jeep and Math based toys gearedPrinciple: The mechanical butterfly is a very interesting kit. After assembling the product, install the battery and turn on the switch. Because the gear plate is connected to the butterfly wing plate, according to the principle of gear transmission, after electricity, the wings flap. Teaching Aid Mechanic Theory! Mechanic Engineering concepts for gears. Instructions in English included in package. Stem Toys are Science, Technology, Engineering, and