1) Virtual reality can be used to simulate tours of the solar system and help students understand it in an interactive way. 2) The story follows Humpty Dumpty as he floats away on a spaceship and goes on a virtual tour of the planets in the solar system with two astronauts. 3) During each stop, the astronauts provide brief descriptions of the planets' key features to help Humpty Dumpty and readers learn about Mercury, Venus, Mars, the asteroid belt, Jupiter, Saturn, Uranus, Neptune, Pluto, and the Sun.