The next time you and your fifth grader go on a hike, take along this key to figure out which common North American animal left a track along the river bank.

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

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

This clay "painting" activity encourages and supports creative development and critical thinking skills.

This project uses science and art to help students learn and teach others about Earth's endangered and extinct species.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

This science fair project idea determines the most effective method of preserving food.

In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

Make sourdough bread...and learn some colonial history and modern science in the process!

This science experiment tests if dog saliva can really help heal wounds.