Educational Insights Hot Dots Jr. Let's Master Kindergarten Math Set with Ace Pen Give your kids the jump-start they need to prep for school success with this fun, interactive Hot Dots Jr. set and Acethe Talking, Teaching Dog pen. Includes 85 K-level lessons and 15 advanced lessons in 2 spiral-bound books and Acethe Talking, Teaching Dog pen. 100 Richly illustrated lessons cover key math skills: counting & numbers, patterns, time, shapes & geometry, fractions, measurement, and more! Press Ace to an answer dothe offers affirmative "ruffs" and encouraging words for correct responses, and gentle redirection for incorrect responses. Encourages independent learning and allows children to work at their own pace. Also includes 15 challenges for next-level skill prep! Give kids a leg up on next year's learning or the practice they need right now! Interactive pen can be used with any Hot Dots and Hot Dots Jr books, activities, and card sets for endless learning and fun! Pen requires 2 AAA batteries (not included).