Here is a monumental list of ideas for science fair projects and experiments, organized alphabetically. Every one of them is a link to a full page, with pictures, of information about the idea. This site is a goldmine.

Science Bob provides instructions for a density experiment you can drink using common supplies with information on how it works.

Here is described a simple process to 'put a voice on a sunbeam' and transmit it over a distance. It is a fascinating example of amplitude modulation of light using sound vibrations. It then describes how the modulated light is detected...

A look at the human side of science. Take a look at how background and motivation can lead to different perspectives, discoveries, and progress in science.

Here's a fun project that combines baseball and math. Major League baseball is played in ballparks that have their own individual quirks when it comes to the exact layout of the field. Fenway Park in Boston has the famous "Green Monster"...

A competition for students in Grades 5 and up, in which they design an experiment that would fly in space under conditions of microgravity. Winners in local competitions are chosen to submit their designs for inclusion in a...

Learn about the experiments by Frederick Griffith, Oswald Avery, Alfred Hershey, and Martha Chase that led to the discovery of DNA as the genetic material.

See a key historical experiment that demonstrated the semi-conservative mechanism of DNA replication.

Science activity shows what happens when a bag can't hold any more carbon dioxide.

This lab activity provides students with the experience of using their own enzymes to convert starch to sugar (a disaccharide called maltose), then testing to see if the conversion has taken place.

This experiment and video demonstration shows how students can break up water into hydrogen and oxygen gas with a simple electrolysis device.

A collection of chemistry activities and experiments with a Christmas holiday theme.

Simple homemade batteries are described that can be made from items found in the home or school lab. These experiments help students understand how to wire them up, the origin of current, voltage and power, as well as the chemistry that...

An activity that will have you questioning which is in control, your eyes or your brain? This activity has students constructing simple paper tubes to investigate how the eyes work.

Create a traditional instrument called a rainstick in this activity.

Make an icosahedron, a shape with twenty triangular faces. This shape is used by most viruses to contain their genetic material in the most efficient way possible.

Understand about a pendulum's natural or resonant frequency in this activity where you create your own pendulums. Students make a pendulum out of PVC pipe, string, and hex nuts.

Why do animals' ears all look different? In this activity, you will research all shapes and function of ears to create "better" ears.

An activity that explores how two cylinders that are identical in shape and mass may travel down a hill differently due to how their mass is distributed. Learn how the distribution of mass in an object can affect its translational...

In this activity students will be creating a giant sieve! The sieve should allow some objects through but create a boundary to keep others out.

View a total internal reflection by using gelatin and a laser with this activity.

Explore the impact pregnancy on the mother's body with this interactive site.

Try this at-home science experiment to learn why sometimes the Moon looks bigger than usual.

This timeline compiles an enormous amount of historical information from the field of optics. From 300 BCE to the present, strategic experiments, findings, and theories are described.