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

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

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

This science fair project idea measures physical dexterity as a function of temperature.

Learn how acid-base catalysis affects enzymes and enzymatic reactions in this science project.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Determine how different measurements of the same object might yield different values. Provide as many reasons that you can think of.

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.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

Construct batteries that make electricity from fruits with this fun science fair project.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

The objective of this science project is to determine the length of time for different seeds to germinate.

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.

Research hemispheric brain dominance in order to determine if you have a dominant side. Test foot, ear dominance. Record observations.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.