Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

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

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

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

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

In this science fair project, students use the streak test to tell minerals apart from each other.

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

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

This science fair project teaches students the differences between fruits and vegetables.

Use pepper and soap to discover some fun facts about the properties of water.

Make edible amber fossils with your second grader to explore the fascinating world of science!

Help your kid feel like a superhero with this safe and fun science experiment that creates an electrical charge that's like a mini lightning bolt!

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

Using a toy race car kids create a visual model of the Doppler Effect.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

Slip some science into storm watching with a homemade rain gauge!

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

This second grade arts and crafts activity is all about caterpillars emerging from their cocoons as butterflies.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

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.

Help your child make a beautiful homemade sandcastle that will last!