This fun middle school science fair project idea helps student discover the concepts behind deep sea diving and how Cartesian divers work.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

In this challenge, students are tasked with creating a model roller coaster that a marble can travel through.

The goal of this science fair project is to assess the acidity levels of common food and household products using pH test strips.

This science fair project demonstrates the "power of conformity".

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

In this challenge, students are tasked with creating a car that can be powered by a balloon!

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

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

Give your child a chance to experiment with how things grow. And throw in something extra to up the fun factor even more...her very own grass pet!

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

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

Check out this cool science fair project idea to explore the relation between onions and eyes and how to prevent eyes from tearing while cutting an onion.

The project researches how lubricants affect the mechanical advantage of a pulley.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Look for correlation between pH values of commercial soaps and detergents and manufacturer claims about eye irritation hazards.

Determine how good we are at direct and indirect observation.

Explore this fun middle school science fair idea to learn about photosynthesis and the key role of light in the growth of green plants.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

Test your friends to find out if you can replicate the placebo effect's incredible results.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Explore the relationship between personality traits and birth order effects.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Here's how you and your teen can stage your own formal debateâbeyond arguing why chores are unethical! Formal debates improve teens' critical thinking skills.