Sneaks Weasel is on the run! Get on the case with Opal Opossum and use super-sleuthing skills to explore maths and critical thinking. The LeapFrog LeapStart Level 4 Spy Maths Activity Book teaches 18 maths and critical thinking skills: identifying fractions, solving problems with unknown numbers, solving word problems and more. It includes over 30 replayable activities and 25+ reward stickers and a spy decoder that encourages critical thinking to solve puzzles. Level 4: Year 1, perfect for ages 5-7 years. The LeapFrog LeapStart Level 4 Spy Maths Activity Book Works with all LeapStart systems (sold separately).