Preschool-aged children will have a ball with these dot-to-dot books. Each book starts with simple exercises, progressing to more complex puzzles. From simple animal shapes to more elaborate illustrations, children will improve their numerical sense and sequencing ability with these adorable exercises. Number lines on the top of each page keep youngsters on track if they forget which numbers come next. Dot to Dot Counting Books: Set of 4, 64 pages each: Count to 10; Count to 20; Count to 50; Count to 100.