Inventor Lab: Projects For Genius Makers
Sntieecr 6 Set 131 PCS DC Motors Kit, Science Experiment Kit Mini Electric Motor 1.5-3V 15000RPM with 66 PCS Bulbs, Buzzer Sounder, Shaft Propeller, Instruction, for Kid DIY STEM Engineering Project
Justech 6 Set DC Motor Kit, Mini Electric 1.5 3V 24000RPM Mini Motor with 86 Pcs Plastic Gears , GM004-GM031s,
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