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This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

This science fair project idea explores the different properties & interactions of sugar molecules.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

This science fair project idea compares biodiversity between drops of water.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

Here's a fun and simple activity to introduce your child to surface tension, and pull an awesome stunt in the process!

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

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

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science fair project teaches students about wilting and browning of salad greens.