These secret code activities are fun, and also provide fourth graders with great opportunities to practice language development and logical reasoning.

The project determines which laundry detergent is best for cleaning clothes.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

This science experiment tests if dog saliva can really help heal wounds.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

There's no better way to show mom you love her than with the tried and true breakfast in bed routine. Make whole wheat waffles along with a vase just for mom.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

Transform that big batch of stuffing into a new dish to add some zest to your dinner with this leftover stuffing recipe.

Put a spin on traditional salad by tossing in a few toothpicks! You and your child will have a bast making these healthy, bite-sized treats.

Are you looking for a new way to help your fourth grader celebrate New Year's Day? Try this Flash Back Book!

Help your child create a working lung model that fills with air just like the lungs inside of his own chest when he breathes.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

Teach kids about a fun way they can remember this more efficiently- the power of mnemonics. Kids will be amazed.

Here's a fun activity that will have your child deciphering directions for sandwich making, and learning about sequence along the way!

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

Try this chemistry experiment with your curious kid and get some "shocking" results!

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

Crowned with orange cream cheese frosting and studded with chocolate chips, these pumpkin muffins make a delicious fall treat.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

This activity is a great way to engage learners in Earth Day celebrations while cultivating skills around nonfiction comprehension and research writing.

This science fair project idea identifies the properties of soap bubbles and invents a new or improved bubble solution.

Be active while learning about American history with this twist on the classic running game "Capture the Flag."

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

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