This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

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.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

The project determines determine if a sports drink affects the heart rate of a student athlete during exercise.

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

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

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 microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Discover flight initiation distance as you play around in the park with this fun bird watching project!

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.

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.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.