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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.

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

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

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

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

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

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

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

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.

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.

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

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.

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

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

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!

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

This project explores ways to prevent static electrical shocks.

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).

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

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

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

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

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.

Learn about the Atwood Machine and Newton's 2nd Law with a pulley and masses of different weights in this physics science project.

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Create your own light bulb and test filaments of different thicknesses to see which keeps the bulb burning for the longest time.