Salmonella and E.coli are common food contaminates. This experiment measures the time it takes for E.coli and Salmonella to reach hazardous levels in fish.

This science fair project idea tests the effect of heat- at varying temperatures- on the viability of biological enzymes.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Science fair project idea examines what is remembered from high school education. Formulate and administer high school curriculum tests to adults over 21.

In this project, different brands of microwave popcorn are tested and compared.

This science fair project idea examines the actual cost of three household light bulbs by testing energy consumption.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Free science fair project idea that examines cheating in school-age children. Project involves a task in which children are tested on various tasks.

Science fair project that tests the effects of diluted soap on the size of bubbles blown from the solution. Will dilution cause smaller bubbles?

This science fair project teaches students the differences between fruits and vegetables.

In this project, several food items are tested to determine whether they contain starch.

In this project, different childproof containers are tested to see how childproof they really are.

How does mold grow? Kids find out by testing different conditions to measure mold growth rate and learn about what factors cause mold to grow more quickly.

This science experiment tests if dog saliva can really help heal wounds.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

This experiment tests which gender is better at catching how a magician performs his tricks.

In this investigation, three different juices are tested to determine which juice contains the greatest amount of vitamin C.

Science fair project that tests the correlation between outdoor temperature or weather conditions and the number of visible stars at night.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

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

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.

This science fair project tested various nose cones to determine which would be the most ideal shape for propelling a water rocket.

Help kids tap into their inner inventor by teaching them how to make peanut butter through trial, error, and lots of taste testing!

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Help your child get comfortable with the concept of estimation, which will come in handy during everything from standardized tests to future shopping trips!

Students usually study for spelling tests by looking over the words and spelling them out loud. Here's a spelling game that gets the whole family involved!

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

Staying close to home doesn't mean you can't get moving! Use this fun challenge activity to encourage your child to move their body in new ways while testing their endurance!

This experiment investigates if stress alters body temperature.