Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

Take a dive into the candy jar with this yummy science experiment.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

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.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

The goal of this project is to create an exciting topographical map out of dough.

This science fair project idea produces varying pitches of sound.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

This science fair project investigates why the number of visible stars changes from place to place.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

This science fair project idea examines which type of insulation holds in the most heat.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

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.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Throughout history, people have used song as a teaching and memory tool. This project explores whether song improves a person's ability to retain information.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.