This science fair project idea determines which flower lasts the longest.

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!

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Check out this cool science project idea to explore how temperature creates annual rhythms that govern plant growth.

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

These cute holly-shaped hair clips are a breeze to make for holiday celebrations. They make a great party activity, too!

This science fair project idea determines whether land or water warms more quickly and investigates how solar radiation increases the temperature of surfaces.

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.

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

In this science fair project, students examine how temperature affects sugar transport within a plant.

Test whether cutting up meats will make it cook faster than just cooking it whole.

Get your child excited about measuring with this fun and easy household measurements activity.

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

The objective of this project is to examine the ways in which a passive solar house may contribute to conservation of energy.

Chlorine and chloramine are added to our tap water to kill harmful microorganisms. What is the best way to filter these disinfectants in your drinking water?

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

This project compares different liquids and the freezing, melting and boiling points of liquids.

A food groups plate shows your child what category her foods belong in. Make a food groups plate with your child before dinnertime.

Science fair project that measure winds speed, temperature, and time of day in order to determine the origins of the wind.

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

Do you think heat can affect a plant's growth rate?

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

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Make this delicious warm apple bread for Hanukkah.

Encourage your child to compare and contrast a wide variety of autumn-themed items by weighing various objects and recording their findings.

Did you ever drink spoiled milk? Find out whether whole milk spoils at the same rate as 2% and skim milk.

The purpose of this science fair project is to investigate whether cooking seeds before planting will speed up germination and growth.