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

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

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

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

Test whether plants can grow without sunlight and water.

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.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

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!

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

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

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

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

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

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.

Using a toy race car kids create a visual model of the Doppler Effect.

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 idea examines whether plants are still able to grow normally if they are turned upside-down.