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.

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

In this design challenge, your child will create a parachute for a small toy using typical household items.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

This science activity will help your student explore the changes that occur to transform an egg from raw to soft to hard-boiled.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

This middle school science fair project determines whether DNA is most easily extracted from under-ripe, ripe, or over-ripe strawberries.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

In this activity, your child will be challenged to make a tower using paper cups.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Learning about how plants grow is a building block in the early grades science curriculum. Put a fun twist on this life science concept with these cup monster friends!

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

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

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

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

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.

Create a three-dimensional X-ray of your child's hand in this simple modeling activity. All you need to get started are black paper and drinking straws

Challenge your learner to design and build a city of their own in this creative engineering activity.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

In this CD hovercraft science project, students will construct their own DIY hovercraft.