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

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Science fair project which evaluates different athletic shoes in order to find out whether any of them affect a person's ability to run.

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

Science isn't ho hum anymore when it involves building catapults to teach your fifth grader about projectile motion.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

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

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

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.

What happens when colored beams of light mix? You might be surprised.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

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

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.