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.

No, that’s not a sponge. It’s a piece of metal that’s light enough to float. Researchers at New York University, who invented the substance, say it’s also strong enough to build boats with ...