Each set features two packs of spiral-bound activity cards and an interactive Pete the Cat pen. Preschoolers simply press the pen on an answer for immediate audio and visual feedback.Ages 3-4/Grade Pre-K. Unique Hot Dots Jr. Pete the Cat set for preschoolers. Includes 2 spiral-bound interactivecard sets with 200+ activities, a Hot Dots Jr. Pete the Cat pen, an award certificate, and reward stickers. Helps develop foundational preschool skills in reading, math, science, social studies, and more. Compatible with any Hot Dots or Hot Dots Jr. card or activity sets. Pen requires 2 AAA batteries (not included).