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4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

This science fair project teaches students the differences between fruits and vegetables.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

Take advantage of the spring and summer sun in this arts and crafts activity that has your learner creating pretty flower prints.

In this activity your child will create their very own marble maze!

This project examines whether playing music during class helps students learn or if it distracts students from learning.

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.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

Celebrate autumn with a seasonal bash. Welcome the fall with a festive party for your little one and her friends, full of crafts, snacks and fun games.

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

This tricky building block challenge asks your learner to think creatively. They will work on their divergent thinking skills as they try to fill up an index card perfectly with building bricks.

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.

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

Explore if planting seeds in a certain direction will affect how fast it germinates.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

This science fair project idea experiments with spinning color wheels and optical illusions.

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.

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

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Find out whether a longer airplane will fly farther or a wider paper airplane.

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

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

In this design challenge, your child will make a bottle rocket using typical household items.