This science fair project idea examines liquids of different densities.

Study how we perceive color by exploring optical illusions such as pointillism, digital images, and Ishihara tests.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Check out this fun science project idea to get a better understanding of unstable isotopes and the process of radioactive decay of isotopes through modeling.

In this design challenge, your child will make a bottle rocket using typical household items.

Determine how effective animal camouflage is by simulating it in an indoor and outdoor setting.

In this fun science fair project, draw a 3D picture and compare the holographic effects of red and blue 3D glasses and HD glasses!

Checkerboard play challenges students to use spatial reasoning and computational thinking.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

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!

The objective of this science fair project is to determine whether drawing with the right side or the left side of your brain will produce a better picture.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

What is a barycenter? Kids learn how gravity and mass influence the orbit of binary systems like planets and moons or stars and planets in this cool experiment.

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

Explore the concept of receptive fields and why different parts of our body have different levels of sensitivity.

This science fair project idea tests whether it is true that humans are in the morning than later during the day/night.

Bake some cookies with an oven that collects sunlight and traps the shorter wavelengths (heat!).

Kids will enjoy this cool demonstration of Newton's Third Law and the conservation of linear momentum.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

The objective of this science project is to investigate why NASA has been using aerogel for the Stardust Project for collecting gas and dust from comets.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

In this experiment you simulate radioactive decay in order to gain an understanding of the basics of half-life.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.