Today's hottest puzzle game meets today's most basic learning concepts in our youngest version of Su Duko ever! Now even the youngest puzzle solvers can enjoy Su Doku! By completing these number, letter, shape, and color challenges, children will build problem-solving skills, AND reinforce basic concepts! All challenges are designed specifically for young children to be successful. Includes an answer key in the back, and over 200 stickers with which to complete the puzzles!