What IS the sky? Where does it end? Is it really blue? And how high can we fly? This charming flap book appeals to young children`s natural sense of curiosity and lets them explore the answers for themselves - from cloud watching to star gazing, peachy sunsets to dazzling Northern Lights, helicopter rides to space travel. Discover the highest thing you can see in the sky, the furthest distance a spacecraft has travelled... and what the sky is really made of.