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

Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

Have fun with bubbles and find out why there are bubbles in your tap water in this cool science fair project idea.

In this activity your child will make a coiling snake out of simple household materials, and also find out why they coil.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

Why would you pay for pricey dolls at the store when your second grader can create and play with her own personalized set?

Halloween is approaching, so why not create some ghost flash cards that will help your child learn their numbers the spooky way?

This conservation of energy demonstration shows why the first hill is the highest on a roller coaster. Learn more about potential and kinetic energy!

Help your child learn more about the military by having him create a portrait of a soldier and write a short summary about why that soldier is important.

Learn about our response to scents that existed in our environment over evolutionary time and consider why scents might affect our mood state.

Why are some pennies shiny and others dark and dull? Find out with this cleaning copper coins experiment, which transforms dark pennies to bright ones.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

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.

Preschoolers need to practice hopping, skipping, and other "gross motor" skills. Why not make it fun by challenging them to move like their favorite animals?

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

The objective of this science project is to investigate why NASA has been using aerogel for the Stardust Project for collecting gas and dust from comets.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Study science with your first grader in this arts and crafts activity that models the reason why fall leaves change color with some paint and crayons.

Why not change things up a bit with this fun way of making those loop-hole bunny ears that sit at the top of his sneakers.

Santa needs all the helpers he can get, so why not create your very own holiday elf to watch over your presents.

If your Father's Day festivities include meeting up with extended family, why not put all the dads to the test with a chili cook-off?

Why pay for expensive plates when you can paint original designs on your own dishes? This fun activity will bring out your kid's creative side.

Science fair project which compares the rates of photosynthesis for various light sources. Which type of light will be best for photosynthesis and why?

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

Check out this cool science fair project idea to learn why it is important for kids to eat healthy foods like fresh fruits and vegetables.

People have identification cards, why not pets? Make an ID card for your family pet, a fun activity that also gives your child some writing practice.

Here's how you and your teen can stage your own formal debateâbeyond arguing why chores are unethical! Formal debates improve teens' critical thinking skills.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

If you're trying to teach your child about waste and its impact on the environment, why not repurpose a plastic milk jug and make your own sandwich container?

Why spend money on fingerpaint when you can make your own? With this recipe, you can stew up your kid's favorite colors right in your kitchen.