In this adventure, the science IS the fun. You'll blow on a paper sail to feel what pushes a solar spacecraft across the galaxy. You'll stack five layers of cloth to build Earth's atmosphere from the ground up. You'll gather dust and gas into a pile until gravity does its work and a star is born right in front of your baby's eyes. Along the way, discover the story of an asteroid belt that never quite became a planet, a rabbit pressed into the face of the moon, and a solar sail crossing the galaxy on nothing but light.