The Match It series features a wide range of award-winning educational titles, Each product in the series features a set of self-correcting puzzle pairs that introduce children to a specific educational topic or skill, The brightly illustrated puzzle cards engage children in the learning process in an entertaining way, Match It, games are a terrific learning tool for everyone, Match It, Math includes 30 self-correcting puzzle pairs: 10 card sets for counting 10 for addition and 10 for subtraction, Ages 3 plus years, Features: 30 two-piece self-correcting puzzle cardsTeaches number recognition counting addition and subtractionDevelops problem solving skillsColorful illustrationsBuilds self confidenceMaterials:Cardboard SKU: LJI020