Here’s a fun way to teach and reinforce numbers 1 through 20! These 20 self-checking, 5-piece puzzles are designed to help children count, recognize, and read numbers as well as perform basic addition. Each puzzle is unique: the four corner pieaces each feature a picture/word representation of a numeral, with the target numeral on the center piece! This set includes 10 two-side puzzles, plastic-coated and easy for small hands to manipulate, plus an activity guide.