In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

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

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.