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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.

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

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

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

This science fair project idea determines if the color of light affects the growth of plants.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

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

In this CD hovercraft science project, students will construct their own DIY hovercraft.

Construct and experiment with a periscope using reflected light rays to gather an image.

This science fair project idea determines what household items are good conductors of electricity.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

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

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

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

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

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

Take a dive into the candy jar with this yummy science experiment.

This science fair project idea experiments with spinning color wheels and optical illusions.

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

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

Take a look at forensic science with your child. She'll learn how to take a shoe impression, just like the detectives do!

In this experiment you will replicate the mummification process by making a hot dog mummy.