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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.

This science fair project idea determines the most effective method of preserving food.

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

Here's a pressed leaf card project that puts science and writing together for your second grader.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

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

In this experiment you will replicate the mummification process by making a hot dog mummy.

In this science fair project, students use the streak test to tell minerals apart from each other.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

In this design challenge, your child will create a parachute for a small toy using typical household items.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

In this activity, your kid will watch coal turn into crystals right before her very eyes, and learn some science along the way!

A homemade lava lamp gives any room a retro flair. Find out how to make a homemade lava lamp, and learn some science too, with this educational activity.

Grow these wheatgrass and alfalfa friends and watch their hair spring up in just a couple days!

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

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

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

The next time you and your fifth grader go on a hike, take along this key to figure out which common North American animal left a track along the river bank.

Here's a fun and simple activity to introduce your child to surface tension, and pull an awesome stunt in the process!