Montessori Science/Astronomy: make your own solar system mat.
Suncatcher craft for kids made from glue, food coloring, and recycled plastic lids BABBLE DABBLE DO
use toilet paper to help kids grasp the scale of the solar system - math and creative writing exercises included
Make a space book! A fun way to teach Preschoolers about the different things space.
Solar System Project Ideas For Kids, http://hative.com/solar-system-project-ideas-for-kids/,