Learn how to make a toy boat with this easy DIY project! Using simple materials like foam and DC motors, create a mini electric boat that glides smoothly on water. Step-by-step instructions show ...

Rock the boat using the physics of buoyancy. ... Two feet of 3-inch-wide-by-1.65-inch-thick polystyrene foam insulation 6. Utility knife 7. Sandpaper 8. Plastic wrap 9. Blow-dryer 10.

“This foam makes a core, like a sandwich, which stiffens up considerably without adding much weight,” Tytus said. Weight is naturally a serious consideration in the design of the boat.

You can also use silicone sealant, latex primer, and spray foam. ... They’ll make sure it actually floats. Boats must be ready the day before the competition on Saturday, Oct. 12.