First, I found a plastic bottle, drilled several holes on the surface of the bottle with an awl, and then connected the drilled holes with a knife, so that the general appearance of the ship came out.

I found a small engine, battery and wires. Try to connect the wire with the engine and battery and try to turn it. The engine is running normally. I taped the wire to the positive electrode of the battery, then pasted the negative electrode, exposing a small hole in the middle, and then put the connected engine and battery into the engine room. Secure the battery with adhesive tape.

Cut the foam into a circle with a knife, then insert the prepared triangular plastic sheet and install it on the engine. In this way, a fan propeller is successful. However, the bearing of the engine is too short and the foam is elastic, so it is difficult to insert the plastic sheet into the foam.

First, insert the round plastic sheet on the bearing, coat the bearing with glue, stick the foam, and blow it at the tuyere for a few minutes, and the fixation is successful. I plugged the wire into the negative electrode, and the plastic foam changed quickly. The experiment proves that the production is successful. However, while rotating, a plastic piece flew out and almost hit it.

Then, I put the boat in a big basin filled with water, and then connected the wires and batteries. Finally, ships can sail in the water.