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This science fair project idea explores how length affects the weight a bridge can hold.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

Is it a square or a circle? See if you can trick your friends with this zany science project!

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.