In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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.

Start your toy engines -- this is going to be a fast and friction-filled race!

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Want to spark your third grader's interest in gardening? Help him make popsicle stick fairies to decorate an enchanting garden oasis.

This science fair project idea investigates how magnetism can defy the force of gravity.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

Plants and light seem to be good buddies, but how far does the friendship really go?

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Who knew that you could make beads out of rose petals? Not only can it be done, but the beads smell wonderful!

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Help your child understand the scientific concept of evaporation with this fun outdoor science activity.

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

This biodiversity project examines the biodiversity in your own backyard.

This science fair project idea explores whether white light can be separated into different colors.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

In this experiment we will be determining whether birds prefer certain colors of seed.