Easy science fair projects include walking on eggs without breaking them and testing helmet effectiveness by using melons. Other fun and easy projects include using taco sauce as a cleaner and building a rocket with a film canister and Alka-Seltzer.
Learning how to walk on eggs is an excellent visual demonstration of nature's packaging. Parents can take photos of and record the process for the science fair display. First the child spreads several large plastic bags on the floor and places about six to eight cartons each containing 12 large eggs. All of the eggs should have the same end, either pointy or rounded, pointed up in the carton.
After removing his socks and shoes, the child scientist, with the help of a parent or sibling, steps up onto the egg carton. The secret in not breaking any eggs is for the child to make his foot as flat as possible. A flat foot evenly distributes the child's weight across the 12 eggs in the carton. Once that foot is resting comfortably, the child places his other foot on another carton of eggs. While it might take practice and the cartons may make creaking sounds, it is possible to stand on both egg cartons without breaking an egg.
Another easy and fun science fair project is testing the effectiveness of bike helmets by dropping different brands of helmets from atop a tall ladder. To see which helmet works best, the child first places a honeydew melon inside each helmet and then assesses the amount of damage to the melon after the helmet hits the pavement.