Each kit teaches specific concepts; helps improve reading skills, increase reading and listening comprehension, and build vocabulary. The Sun: All our energy comes from the sun. The sun is a dynamic ball of gases. Day and night and the seasons. The solar system. How scientists study the sun. The Moon: How it differs from the Earth in size, composition, and atmosphere. The moon orbits the Earth and reflects light from the sun. Phases of the moon. What astronauts found on the moon. For K-2.