Compare fractions in this two-player math game. The objective of the games is to work together to determine who has created the largest fraction.

The project compares three different methods of testing turbidity in water: the secchi disk, spectrophotometer, and turbidity test kit.

Put your kid to the test and have him compare and contrast elements in a narrative text by identifying how characters and situations are alike and different.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

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

Let your kid experiment with textures among fabric and other materials that are smooth, rough, soft, or slippery—and then they'll make a texture book!

Do different types of oil mix or stack? Find out in this science fair project idea!

How do search engines work? What makes various search engines different? This project delves into the world of web crawlers, caching, indexing and algorithms.

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

Invite your fifth grader to test the different rates of liquid absorption in synthetic and cotton materials, such as nylon and cotton.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Create clear sound shakers so your preschooler can observe and compare the different sounds that objects make!

In this science fair project, we will test how different kinds and shades of hair respond to bleach.

Race to double numbers in this competitive card game. Try one-digit or two-digit numbers, or more!

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

In this activity, your child will experience multitasking, then mindfulness and compare the two in terms of productivity and calmness.

Melt the ice, but save the lawn. The objective of this science fair project is to explore the effects of different substances on melting ice.

In this simple math activity, your young learner will compare two types of Valentine's Day candy using a Venn diagram.

Explore the properties of light and color using photographic filters. Take pictures of color spectrum, compare results of different filters.

Kids make strong bubbles to investigate the effect different additives have on bubble life in this cool science fair project idea.

Administer IQ tests to volunteers. have one group practice typical IQ test problems. Then compare results of the two groups.

Monitor the impact learning how to play chess has an academic performance. Divide subjects into two groups compare GPA

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

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

Boost your preschooler's attention to detail by getting her to explore the differences between two different pumpkins: large and small.

This flash card game will help your child memorize words while visually learning the differences between objects.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

This two-ingredient dough, sometimes called "moon sand," is a quick and cheap way to let kids explore their senses, build fine motor skills, and play.