Discover whether a metal will expand under hot water.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

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

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

Find out whether putting something on top of a plant will inhibit its growth.

Hone your child's skills of observation and take a look at forensic science for an interesting afternoon of exploration and detective work!

Do different types of oil mix or stack? Find out in this science fair project idea!

Explore aromas with your child and help boost her brain power with some fun and interactive science activities.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot move in a pattern related to the sound and rhythm of music.

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.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

Introduce your child to the importance of preserving the world's biodiversity by turning a lesson on endangered species into a fun game for the whole family.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

How powerful is the reaction between baking soda and vinegar? Find out here!

Examine the effect of pressure on carbonation in soda.

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

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.