This is a fun and inexpensive project and it's a great way for your child to build basic geometry skills, like shape recognition and pattern/angle familiarity.

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!