Educational Insights Hot Dots Tots Colors and Shapes Interactive Board Book Set with Elliott Pen Simply press Elliott to the correct answer dot on any page to activate fun lights and sound effects. Includes two interactive board books, Rainbow Salad and A Day at the Park, and Elliott-The Musical, Teaching Bear pen. Books introduce 10 different colors and shapes. Elliot-The Musical, Teaching Bear pen is not compatible with other Hot Dots or Hot Dots Jr. sets. Pen requires 2 AAA batteries (not included).