The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

Challenge your learner to design and build a city of their own in this creative engineering activity.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

Have your child kick off their summer vacation by making a miniature water slide!

In this experiment you will replicate the mummification process by making a hot dog mummy.

This science fair project idea identifies trees using a dichotomous key.

In this open-ended activity, students will be given a small quantity of three types of materials and asked to design a prototype for “something that will improve the school.”

Find out which type of sponge holds the most water.

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.

This science fair project idea experiments with spinning color wheels and optical illusions.

In this activity, your child will make her own "quicksand" to better understand how a substance can be both fluid and solid at the same time.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

What is vegetative reproduction? Find out how you can clone plants and regrow cabbage from a stem in this cool experiment!

Want to help make studying the nervous system a little more fun? This thinking cap is a great way to learn external human brain anatomy.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

This simple experiment serves as an introduction to the greenhouse effect.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.