This science fair project idea investigates the hardness property of minerals.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

This science fair project teaches students the differences between fruits and vegetables.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Instead of drilling facts, grab sidewalk chalk and head outside for a rousing game of this Math Run game. Play the Math Run game with your child.

Discover whether cold or hot water from the faucet will boil faster on the stove.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

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

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Practice math facts with your third grader was never so simple! This activity makes addition, subtraction, multiplication, and even division a lot more fun!

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

This project compares the strength of one, two, and three-ply toilet paper.

This science fair project idea explores substances that cause a bubble to last longer.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This science project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

Do you think heat can affect a plant's growth rate?

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

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

Most parents probably wouldn't mind subtracting 8-9 years off their age. Here's a fun third grade subtraction activity that may do just that.

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

Let your child step into the main character's shoes as they keep track of the setting, events, and names of characters in the story by keeping a journal.

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

Make a backbone model to explore human anatomy and life science.

Here's a math activity that uses coin riddles to help your third-grader improve his coin-counting and logical thinking skills.

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

Practice multiplication facts and geography at the same time in this fun third grade math card game.