This thing was made with Tinkercad. Edit it online https://tinkercad.com/things/fPDLMejO0JS The America's Cup Toy Boat Kit demonstrates teaching physics with 3D-printed toys. It was used in aTech Camp to teach grades 4, 5, and 6 in a Rochester, NY elementary school (http://interlockroc.org/2013/08/02/can-3d-printing-and-computer-aided-design-be-of-value-in-the-contemporary-urban-elementary-school-curriculum/). Each of the 20 students built a boat and tested it in a shoebox. Constructively hacking the design (changing sail shape and position, hull length, etc.) teaches confidence in creatively making and fixing things.-Print the kit of sailboat parts (designed to fit on the small Printerbot Simple bed). -Cut 4 equal straw pieces (4 inches long works well) for hulls. -Cut a 1 inch straw for attaching the tiller to the rudder. -Cut a straw for the mast (4 inches long works well). -Cut the triangle sail from colorful cellophane or plastic film and tape it to the 3D-printed booms. -Assemble the sailboat. -Fill the plastic box half full of water. -Float the boat in the water and adjust tiller and sail for a broad reach. -Gently blow on sail through a straw. -Each boat in the regatta has a shoebox and the sailers provide their own wind at the starting signal. -The object of the game is to go the length of the box without touching the sides when wind blows from various directions. Materials: -3D printed parts: sail, booms, forward frame, aft frame, straw plugs, rudder and tiller. -5 colorful soda straws. -Colorful cellophane food packaging. -Plastic shoebox and water. Lessons include: -Center-of-gravity and tipping over. -Angle of incidence and resulting forces on the sail. -How to steer a sailboat to go other than the way the wind is blowing. -The iterative design process (constructive hacking) where students can modify the boats to improve performance or fix flaws. Teachers can re-use the apparatus with subsequent classes.