Young readers learn to count to 20 with this interactive touch-and-trace book of numbers. Young readers will learn to count to 20 with this interactive touch-and-trace book of numbers. With numbers to trace and simple addition problems to complete, this book has plenty for little ones to discover. Using their finger, children can trace each grooved number and explore its shape. Colorful lift-the-flaps add to the fun of learning An exciting and tactile introduction to the magic of math