Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

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

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

This science fair project idea explores substances that cause a bubble to last longer.

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

This project examines what types of objects burn and which burn faster and cleaner.

Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.

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

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

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

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

Find out whether matte or shiny nail polish lasts longer.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

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

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!