The Tell Me Why Series, based on the books by Arkady Leokum, gives informative and easy-to-understand answers to the many questions children ask about everyday subjects. This program answers questions such as "How big is the universe?" "What makes the stars shine?" "Why does the moon change shape," "What is erosion?" "How many different kinds of rocks are there?" "What is coal?" and "What is an alloy?".Grades 1-6. 60 minutes on DVD.