This science fair experiment idea's objective is to understand the general concept of an acid and a base.

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

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

In this activity, children will work on their mathematics and engineering skills as they attempt to recreate the Eiffel Tower out of building blocks!

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

Discover how and which salt melts ice the quickest.

This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.

Here's a fun activity that will have your child researching, collecting, and charting plant specimens from the neighborhood.

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

This science project idea examines the effect of microwaving on various objects.

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

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Is your child a nature nut with an eye for creative, green-friendly projects? Introduce them to this amazing DIY bird feeder!

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

Learn about Ikebana, or the Japanese art of flower arranging, with your child while artfully arranging spring flowers!

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

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