These two-book sets with included Hot Dots Ace - The Talking, Teaching Dog pen provide children with 100 lessons on a variety of reading and language arts skills appropriate for kindergarten, from simple comprehension and vocabulary to spelling and punctuation. Fifteen of the 100 lessons are challenge activities that prepare children for skills at the next grade level. Details:Includes two 50-page books100 lessons on a variety of reading and language arts skillsIncludes 85 kindergarten-level activities and 15 challenge activitiesRequires 2 AAA batteries (not included)For ages 5 and up