Spark a love of numbers & build math confidence with Hot Dots featuring the global TV series Numberblocks. Children use the Hot Dots Numberblocks pen to answer early stage math questions, receiving immediate feedback, including audio, sounds & music from the show. Interactive pen includes a 60-page, spiral-bound book with more than 75 math activities. Children ages 4 & up can practice number-recognition from one to 10, number order, addition / subtraction & more. Pen requires two AAA batteries (not included).