If you're looking for something to keep your kid busy on a warm day, and give him some writing practice in the process, bring on the mud!

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Test ability to distinguish between natural and artificial aromatherapy oils. Select fragrance, natural and synthetic sample. Volunteers state preference.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Create a brush pile to help wintering wildlife stay warm and cozy through the winter.

This science fair project explores discover whether the acidity of sour candy is comparable to that of battery acid.

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

Help your child plant a "tea garden": a garden made of herbs for making teas.

Compare different remedies for cooling the mouth after eating spicy food.

This science fair project idea determines an average personâs ability to use their anaerobic power system over a period of 2 weeks.

This science fair project idea creates an underwater habitat and explores the basic needs of living things under water.

This science fair project examines how seeds hitchhike on animals and clothing.

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

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

In this science fair project, students investigate how different colors influence appetite.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

This science fair project determines which of two chemical agents can be used to release the drug (tea) from hydrogel crystals.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

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

Use a dichotomous key to identify plants or animals.

What is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

Science fair project that compares leaf pigments of various tree species. Which tree species do you think will have the most pigments and why?

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

Construct batteries that make electricity from fruits with this fun science fair project.