SET 11: Stars (Kit 31) — Planets (Kit 32) — Forces (Kit 33) YOUNG SCIENTISTS EXPLORE THE SOLAR SYSTEM! Study the stars with a star fact book, make a constellation box, design a telescope, and use bouncy balls and planet facts to create a solar system mobile that will "enlighten" any room. Finish this set with the study of forces, gravity, momentum, and Newton's three laws of motion. A great introduction to astronomy!