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This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Determining the Ages of Trees

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

What Doesn't Belong? A Categorization Game

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

Counting Tree Rings

Science fair project determines relationship between number and variety of insects and spiders by collecting and counting invertebrates in a ecosystem.

Invertebrate Ecology

This science project teaches students to classify different shapes of leaves.

Shapes of Leaves

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

Is it a Fruit or a Veggie?

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

The Wonderful World of Weeds

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

Rats!

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

Bird Songs

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Creatures That Bug Us

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.

True or False? The Lying Experiment

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

Making Measurements: How Big is Your Hand?

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

Six Degrees of Separation 

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

Fungi Biodiversity

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

Cricket Behavior

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!

Make a Temperature Tracker

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Potato Chip Science: How Greasy Are Your Potato Chips?

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin

Pumpkin Investigation

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

Does Storing Cucumbers and Tomatoes in the Fridge Spoil Its Unique Flavors?

Encourage a group of third graders to play this fun game of Whistle Hide-and-Seek as a warm-up to get them prepared for finding a "lost" camper.

Play Whistle Hide-and-Seek

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

How Old is That Tree?

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Changing the Period of a Pendulum

In this plant habitats activity, children play the role of an ecologist and take surveys of different areas to discover the best habitat for dandelions.

Plant Habitats: Dandelions

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

Is There a Relationship Between Tempo and Genre?

This project investigates the affect of storage temperature on microwave popcorn.

Where Should You Store Your Popcorn?

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

What Do Ants Eat?

In this activity, your child will be challenged to build a tall tower out of building bricks! The instructions include questions prompts to guide students through the design challenge.

Building Brick Challenge: Build a Tall Tower

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

How to Make an Anemometer

This science fair project examines how seeds hitchhike on animals and clothing.

How Do Seeds Hitchhike?

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

What Lives in the Air Conditioner?

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