Foil Boat
An easy, cheap, and fast way to make a small boat that floats requires a small foil loaf pan, soft modeling clay, scissors, a wooden or bamboo kebab skewer and a flexible vinyl or plastic report cover. The foil pan should be pinched to shape the bow of the boat, and the report cover should be cut into a triangle shape. After folding the triangle in half, with the point of the top touching the flat bottom, poke a hole roughly an inch from the top and bottom. The skewer should be put through both holes, and the base of the skewer affixed to the bottom of the pan with the modeling clay.
Origami Boat
There are many patterns for folding an origami boat -- in many cases, with the right material or a simple treatment after folding, a paper boat will indeed float. Though it's possible to make an origami boat out of standard paper that will float, the problem is that it won't float for long. Instead, try making an origami boat out of foil-- being careful not to tear the hull-- or you can apply a gentle waterproofing spray to an origami boat made with paper.
Juice Box Boat
A used 1/2-gallon orange juice box can be used to make a floating paddle boat with only a few modifications. Working lengthwise, cut the juice carton in half, cutting the top from one half and sliding one section into the other to form a box. Tape chopsticks to each side, so they extend 3 inches beyond the back of the boat, and cover the whole boat in duct tape. For paddles, cut two rectangles of plastic from an empty dish or laundry detergent bottles and cut a snip halfway through the sides of each piece. Slide the rectangles together to make an X shape. Stretch a rubber band between the chopsticks and center the paddle between its lines, taping the rubber band into position.
Model Boat Project
Sailing small model boats is a hobby enjoyed by many enthusiasts, and several retail craft and hobby shops sell supplies and kits for making seaworthy model ships. Hulls can be purchased made of either wood or fiberglass, and can be as large and ornate as the builder desires. These craft can be outfitted with radio-controlled engines and other mechanical components.