Educational Insights Hot Dots Jr Pete The Cat-Your Groovin', Schoolin' Friend Pen (2450) Easy-to-use, interactive pen engages young learners-simply press the pen to answer and receive instant feedback Compatible with the entire line of hot dots and hot dots jr. Books and card sets Requires 2 AAA batteries (not included) Offers rockin&#039; and groovin&#039; interactive learning opportunities. Provides confidence-building feedback. Encourages independent, self-paced learning. Easy-to-use, interactive pen that engages young learners. Compatible with any Hot Dots or Hot Dots Jr. card sets or activity sets. Pen requires 2 AAA batteries (not included).