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In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

Here's a pressed leaf card project that puts science and writing together for your second grader.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

This science fair project idea determines which method of hand cleansing is the most effective.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

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

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

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.

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.