BRING LEARNING TO LIFE: Press the Hot Dots Light-Up Interactive Pen to an answer dot on any one of dozens of Hot Dots and Hot Dots Jr. books, activities, and card sets for an interactive screen-free learning experience. INSTANT FEEDBACK: Pen provides audio feedback and lights up green for correct responses and provides gentle redirection and lights up red for incorrect answers. Sounds can be muted. (Pen requires 2 AAA batteries, not included.) CONFIDENCE BUILDING: Immediate audio and visual feed