It’s interactive learning fun! | Brings dozens of Hot Dots and Hot Dots Jr. books activities and card sets to life Äì just press to an answer dot for an immediate audio visual response. | Includes Hot Dots Talking Pen with brand new sleek silver design 17 speech and sound effects and flashing lights. | Compatible with all Hot Dots and Hot Dots Jr. sets ranging from shapes and colors to academic vocabulary science language arts and more. | Perfect for independent self-paced learning. | Sleek silver design with high tech feel. | Way more fun than flashcards! | Requires 2 AAA batteries (not included).