This two-book set with included “Ace"—the Talking, Teaching Dog™ pen provides children with 100 lessons on a variety of math skills, from counting & numbers and patterns to time and fractions. Fifteen of the 100 lessons are challenge activities that prepare children for skills at the next grade level. 85 Pre-K level math lessons in these areas: Counting & Numbers, Patterns, Time, Shapes/Geometry, Fractions, Measurement, and Math Facts, PLUS 15 challenge reading lessons for advanced learners (8”H). Book set includes Hot Dots Jr. “Ace"—the Talking, Teaching Dog™ interactive, electronic Hot Dots pen. Ace pen requires 2 AAA batteries (not included). Ages 4+.