Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

In this science fair project, students create their own miniature salt flats at home.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

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

Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.

This science fair project teaches students about wilting and browning of salad greens.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

Explore if planting seeds in a certain direction will affect how fast it germinates.

In this science fair project, students make their own rain gauge to measure rainfall.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

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

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

This science fair project idea investigates if fats add to the flavor of food.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

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.

An home science experiment for older students that teaches about the science behind heat.

This science fair project idea investigates the difference in reaction times between boys and girls.

This science fair project idea produces varying pitches of sound.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

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!

This science experiment tests if dog saliva can really help heal wounds.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.