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1. Insert the propeller into the motor shaft.
2. Install 2 plastic bottles and wrap them around the mounting strap.
3. Mount the motor on the plastic bottle, and the catamaran is installed.
4. Turn on the power and let the boat float on the water,with the wind, the boat runs up.
1. Close to life and teaching materials to stimulate curiosity.
2. Bring different scientific and meticulous experiences to children.
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