Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

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.