Lets learn about numbers from 1 to 20. Each puzzle card has three pieces: the numeral, the same number of objects to count, and the number in written form. By simply matching the pieces together, children will learn to recognize the numeral and spelling of the numbers. The puzzles are also self-correcting. Twenty puzzle sets included. The Match It! Series features a wide range of award-winning educational titles. Each product in the series features self-correcting puzzle sets 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 Numbers includes 20 self-correcting puzzle sets. Ages 3 + years.