Included 6 units of each book; 6 each of "Ace"- the Talking, Teaching Dog and "Kat" - the Talking, Teaching Kitty. Take a trip with Ace and Kat! Four interactive preschool adventure books feature "Ace" - the Talking, Teaching Dog and "Kat" - the Talking, Teaching Kitty in adventures around the globe. Read along with the stories and use Ace or Kat to respond to activities practicing basic preschool skills including letters, numbers, counting, shapes, colors, alphabet, beginning phonics, patterns, sequencing, and more. Pens require 2 AAA batteries (not included). Grades Pre-K+/Ages 4+ The nitty-gritty includes: 4 Hot Dots Jr. storybooks, 24 pages each, 10 Interactive activities in each book teach basic preschool skills.