Explore the way things work with the Letter Factory friends using science, technology, engineering, maths and teamwork! The LeapFrog LeapStart Level 2 STEM Activity Book teaches 16 Preschool STEM skills: reading simple graphs, experimenting with trial and error, using tools to solve problems and more. It includes over 40 replayable activities and 25+ reward stickers. Level 2: Preschool, perfect for ages 3-5 years. The LeapFrog LeapStart Level 2 STEM Activity Book Works with all LeapStart systems (sold separately).