Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Play Rock Tic-Tac-Toe, the perfect outdoor game for all ages. Help your child develop thinking skills and get away from the TV!

This science project challenges students to study the salt content in tap water and learn about electrochemistry.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

Try this fun garden graphing project with your kindergartener this summer to give him a leg up in math and science while spending some valuable time outdoors!

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Determine the effect of homework on academic performance. Collect grade info at the end of a semester, determine correlation between grades, amount of homework

Free science fair project idea examining how different types of water affect plant germination and growth.

Find out whether matte or shiny nail polish lasts longer.

In this experiment, students create music with subliminal messaging to try to influence people's decision-making.

Check out this cool and free middle school science fair project idea on how to make a solar oven.

Kids build a rainforest food web to explore trophic levels in this cool science fair project for 4th grade.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

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.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

Plant a mini herb garden and teach your child about science and nature.

This free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

Devise list of randomly chosen words, test how many words volunteers can remember. Compare results of adults and children. Which have better memories?

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.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

Science fair project that creates fog using bottles of hot and cold water.

Kids make an electromagnet in this electromagnetic induction experiment to learn about induction, current, and the right-hand rule.

You and your child can create this beautiful butterfly mobile for hanging anywhere in the home (and learn about this magical creature while you're at it).

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

This project explores ways to prevent static electrical shocks.

Reuse and recycle cardboard tubes to make spooky spiders, kooky caterpillars, wacky worms, and more.

Can cells be frozen? This science fair project provides information to answer this question.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.