Book excerpt: Enter the lab of Professor X. Ploder as his assistant on a top-secret assignment: designing and testing a spy's pocket rocket. Then discover all about the science of rockets through practical experiments that you can try at home. Level 3 is for children able to read on their own. The stories are exciting and captivating in order to develop the child's own desire to read. More text and more complex sentence structure are presented, with information spreads to help develop the reader's general knowledge. The choice of subject widens to match the broadening of children's experiences and interests. Whether your child is learning how to read or wants to practice and improve his or her reading skills, DK Readers have the right story for developmentally appropriate reading at home. This innovative range of graded readers combines a highly visual approach with stories that children will want to read. Easy-to-read stories for beginning readers with word repetition progress to stories with rich vocabulary and more challenging sentence structure. There's a DK Reader for every child!