What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

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

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

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.

This science fair project idea identifies trees using a dichotomous key.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Show your child how to concoct a simple duo of household ingredients that changes color as acids and bases are added!

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

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

The project examines absorbent polymers absorbency in disposable diapers and their unique ecological problem to the environment.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

In this project, several food items are tested to determine whether they contain starch.

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

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

If you're looking for something to keep your kid busy on a warm day, and give him some writing practice in the process, bring on the mud!

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

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

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.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Develop your child's mathematical and engineering skills with this fun building brick challenge. In this activity, your learner will be challenged to create a boat out of building bricks.

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

In this activity, your child will be challenged to build a tall tower out of building bricks! The instructions include questions prompts to guide students through the design challenge.

What combination of cloth and stain will be the easiest for removing stains? Test and experiment!

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

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