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

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

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

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

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

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

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

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.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

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

In this fun activity, your child will create their very own solar oven to bake s'mores!

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Help your child create a magical miniature garden in the most unlikely of places: a recycled plastic bottle!

This science experiment tests if dog saliva can really help heal wounds.

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

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

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.

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

This science fair project idea produces sounds by creating vibrations using different objects.

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

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