Educational Insights Hot Dots Jr. Interactive Storybooks- Ace and Kat Undersea Adventure, Set Of 6 Set of 6 identical Ace and Kat Undersea Adventure storybooks. Fun story guides preschoolers through 11 interactive early learning activities. Activities cover colors, numbers, beginning phonics, patterns, shapes, and more. Use any Hot Dots or Hot Dots Jr. pen (not included) to bring the stories to life. Touch the pen (sold separately) to an answer dot for positive reinforcement (correct responses) or gentle redirection (incorrect responses).