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.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

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.

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

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.

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

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

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

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.

This activity is a great way to teach kids that, to find examples of science in action, they donât need to look any further than their own backyard.

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

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.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

This science fair project idea explores whether talking to a plant will help it grow.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Do you think heat can affect a plant's growth rate?

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Help your first grade scientist learn about metamorphosis by observing the life cycle of some interesting creepy crawlies.

This science fair project teaches students about wilting and browning of salad greens.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.