Which objects at the water park are inclined planes? What are the three primary colors? Engage readers in key early-learning concepts with this interactive series. Simple text and colorful photographs mix key information with in-book activities. Readers will enjoy the challenge of answering the questions and the feeling of accomplishment as they learn each concept. This series supports a wide variety of science, math, and language arts curricula. Additional comprehension aids include an answer key, a phonetic glossary, sources for further research, an About the Author section, and an index. Learning about concepts has never been so much fun!