In the past few years, we have covered plenty of awesome engine models for STEM education. The TECHING 5-Cylinder Radial Engine Model is a 1/6 scale engine with over 230 pieces. It has an aluminum alloy and stainless steel construction. It takes about 4 hours to assemble this.
More gadgets like this: here
This kit is ideal for kids over 14 years old. It runhttps://amzn.to/3GOwh8as on a 800mAh battery. It has automatic power off function when meeting external resistance. It weighs only 1.9kg.
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