I usd this presentation with my preschool (ages 3-5) class to review the concept of day and night. It shows some things we can see in the sky and some activities we do. The kids should say for each picture whether it belongs with day or night. The final slide links to the short Pixar film "Day and Night." The kids LOVED this, and I paused at a few moments to ask them if day or night was being shown and what other things they could see (sun, sheep, stars, etc.).