Paddle Boat

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It's a test of speed to see who can return their boat the quickest. The quick-return boat was specially designed to head back to its original launch site. As soon as you place the boat into the water, the buoyancy lever starts taking in water. Once it reaches maximum capacity, the lever swings down reversing the paddle direction. The challenge: Weight the boat using pennies in the trays on the boat to add more weight and increase displacement. See how fast you can return the boat after it travels 20 feet. The more weight on the boat will cause the buoyancy lever to switch faster, thereby reversing the engine sooner. However, be careful, as more weight means greater water displacement, making the boat move slower. Find the perfect balance and beat your friends in this fun science game. All parts snap together easily. It's simple to print and assemble with the included PDF instructions. Watch the YouTube video: https://youtu.be/fxd72qmHTqM I was visiting Portland when I admired the massive freighters passing by hourly, wondering about the bilge water being pumped out of the ships and where that water must have originated from. The stability of a ship lies in its buoyancy displacement. The more water it takes in, the more stable it becomes. My cousin and I used to sit along the pier and call out the countries of these grand freighters as they muscled along the shore. As they got closer to port, they began rising out of the water while pumping water out from their tanks. The science behind buoyancy fascinated me and inspired me to build this boat.