Rotary Engine Model Kit that Works, Car Engine Building Kit with Motor, STEM Mechanic Engineering Construction , Collection Model(1130 PCS)

Individual packaging - All parts are packed in a separate packaging bag, which is easier for everyone to understand. The packaging now includes easy-to-follow instructions. It is easy for everyone to understand and assemble. Simulate the Work of a Real Engine - equipped with an L motor and battery box (requires 6 AA batteries, not included), so that it has enough power to complete the work of the piston. Let you see the working principle of the truck engine with your own eyes. For those who love mechanical details, it is absolutely irresistible. Provide more Working Speeds - This engine building kit has added a speed adjustment function, including low speed, medium speed, high speed and rapid speed. More realistically simulate the principle of engine operation, adding more realism to your model.

• ‌Individual packaging - All parts are packed in a separate packaging bag, which is easier for everyone to understand. The packaging now includes easy-to-follow instructions. It is easy for everyone to understand and assemble.
• Simulate the Work of a Real Engine - equipped with an L motor and battery box (requires 6 AA batteries, not included), so that it has enough power to complete the work of the piston. Let you see the working principle of the truck engine with your own eyes. For those who love mechanical details, it is absolutely irresistible.
• Provide more Working Speeds - This engine building kit has added a speed adjustment function, including low speed, medium speed, high speed and rapid speed. More realistically simulate the principle of engine operation, adding more realism to your model.