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

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

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

In this activity, students will think about the form and function of household objects as they compare and contrast kitchen serving spoons of various sizes and designs.

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!

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

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

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

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Kids will explore the corrosiveness of soda in this cool science fair project by leaving pennies submerged in soda overnight.

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

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

In this experiment we will be determining whether birds prefer certain colors of seed.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

Satisfy your sweet tooth with this easy summer activity! Make homemade ice cream and let your child practice his science skills.

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

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

Cinnamon is tasty, but does it have super powers as well? Find out if cinnamon can repel mosquitoes in this outdoorsy experiment.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.