This science fair project idea explores the egg's thin membrane.

Explore the world from your own home by conducting research about other cultures with your 4th grade child.

In this science fair project you will make a model of a cell membrane using very simple material.

Test whether plants can grow without sunlight and water.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

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

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

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

Do different types of oil mix or stack? Find out in this science fair project idea!

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

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

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

This science fair project will help students learn about non-vascular plants, such as mosses.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

This science fair project idea produces varying pitches of sound.

Find out whether packaged seeds actually do expire in this new science fair project idea.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

In this science fair project, students create their own miniature salt flats at home.

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

Explore if planting seeds in a certain direction will affect how fast it germinates.

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

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.