Learn about our solar system in this Step 3 Science Reader packed with NASA photos and space facts! Step into Reading, the most trusted name in early readers, delivers an introduction to the final frontier that kids can read themselves! For up-to-date information (including about Pluto and its fellow dwarf planets) and stellar photos and illustrations, kids eager for mind-blowing nonfiction need look no further! Step 3 Readers feature engaging characters in easy-to-follow plots about popular topics. They are ideal for children who are ready to read on their own.