Let's learn about numbers from 1 to 20 with Match It! Number Match! Each set of two piece number puzzle cards has the same number of objects to count found within each number shaped puzzle pair. By simply matching the pieces together, children will learn to recognize the numeral and can count its contents. The puzzles are self-correcting as no two puzzle cuts are the same, so only correct matches will fit together. The fun, brightly illustrated puzzle cards engage children in the learning process in an entertaining way.