Educational Insights Hot Dots Jr. Ultimate Science Facts Interactive Book Set with Pen Uncover some truly fascinating facts and encourage an early interest in science with three fully illustrated, interactive, non-fiction books! Includes three interactive, non-fiction books and a translucent, interactive, Hot Dots Talking Pen. Press the Hot Dots Talking Pen to an answer dot on any activity for one of 17 audio responses and sound effects. Perfect for independent, self-paced learning helps children prepare for academic success. Pen requires 2 AAA batteries (not included).