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This science fair project idea determines whether dogs can be trained faster using a food reward or praise.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Science fair project that demonstrates how a rainbow forms, by using water to split white light into its many colors.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.

Check out this cool science fair project idea to explore non-chemical means of preserving fruits by using thermotherapy.

Science fair project that guides you through how to test the humidity in the environment using a homemade psychrometer.

In this design challenge, your child will create a parachute for a small toy using typical household items.

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

Teach your first grade scientist the difference between liquids and solids using maple syrup.

Reinforce your child’s understanding of the alphabet by helping them construct all of the letters using pipe cleaners.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

This fun elementary school science fair project idea helps students in designing an amusement park using their knowledge of forces and simple machines.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

In this science fair project, students determine whether a bean plant grows faster and taller using a traditional soil planting method or hydroponic method.

Build a magnetic linear accelerator using a ruler, neodymium magnets, and small metal balls in this fun science fair project exploring magnetic propulsion.

Science fair project in which you will create your electricity by making a homemade battery using salt water, a nail, and a copper wire.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Score a bull's eye with this cool science fair project on horizontal projectile motion. Guide a marble to its target and predict its trajectory using math!

Create an organic plastic product using vinegar and cream. Track decomposition over course of several weeks. Compare decomposition with traditional plastics.