No Night Today - Nick and Sally want to keep playing, but it's getting dark. Why does nighttime have to come? The Cat knows someone who can answer that question - Astronaut Audrey! With a trip to her International Space Station and a large model of the solar system, the kids learn that it's the earth's spinning near the sun that makes it night or day. Fun in the Sun - Phew it's hot! Too hot to play outside. Not according to The Cat! His friend Hilda the Hippo knows all about having fun in the sun. A visit to Muddymoo River teaches them that hippos make their very own sunscreen to protect them from the hot sun.Now that they all have their sunscreen on, it's time for some fun in the sun!