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 recognise the numeral and spelling of the numbers;The puzzles are also self-correcting.Twenty puzzle sets included;For ages 3 and up;Includes 20 three-piece self-correcting puzzle cards;Teaches numbers and counting;Colourful illustrations