This two-book set with included Hot Dots® 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. Psst...They're Learning! • Playful, interactive learning • Encourages parent-child interaction • Develops early math skills necessary for school success • Offers confidence-building feedback • Provides ample practice time Cut to the Chase • 85 Second-grade-level lessons in these areas: Counting & Numbers, Patterns, Time, Shapes/Geometry, Fractions, Measurement, Money, Place Value, Algebra, and Math Facts, PLUS 15 challenge reading lessons for advanced learners • Book set includes Hot Dots® interactive, electronic pen • Hot Dots® pen requires 2 AAA batteries (not included)