Two new additions to our best-selling line of Hot Dots Jr. card sets introduce preschoolers to the basics of science and strategic thinking. Use with Ace-the Talking, Teaching Dog or all-new Kat-the Talking, Teaching Kitty. Simply press either pen to an answer on any card for immediate audio and visual feedback. Each set features 36 illustrated, double-sided question cards. Each set includes 36 double-sided cards. Introduces basic science and problem solving skills.