Educational Insights Hot Dots Tots All About Vehicles 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, Time to Go! and A Day at the Beach, and Elliott-The Musical, Teaching Bear pen. Books cover cars, boats, planes, and other vehicles and teach shapes, colors, numbers, emotions, opposites, action words, family words, and more. 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).