Introduce your fourth or fifth grader to volume by having him build rectangular prisms, and then count each sugar cube to check his volume calculations.

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

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

Get estimating with this spooky activity that asks your young mathematician to rely on their problem-solving skills to figure out how many items they believe are in spooky Halloween jars!

This hands-on activity gives your child an opportunity to apply various strategies to solve a problem and to check if his answer makes sense.

Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

Your child can turn cookie dough into a big pile of colorful painted fall leaves ready for eating!

This Pysanky egg-decorating activity is perfect for young artists. Bring a little color and creativity to any holiday with this traditional Ukrainian craft.

This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

Using simple materials found around your home, you can reinforce the static electricity concept by helping your child build a simple device with zapping power!

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Time is an abstract concept that's difficult to grasp. But waiting for the turkey to come out of the oven on Thanksgiving is a concretely yummy experience.

This science fair project idea identifies clouds as a means of predicting the weather.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.