In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

This science fair project investigates why the number of visible stars changes from place to place.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

This science fair project idea explores whether white light can be separated into different colors.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

This science fair project focuses on the use of a conductivity device that will determine if a substance dissolved in water can or cannot conduct electricity.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

In this experiment we will be determining whether birds prefer certain colors of seed.

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

This science fair project idea determines the probability of a coin landing heads or tails.

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.