These two-book sets with included Hot Dots pen provide children with 100 lessons on a variety of reading skills appropriate for each grade. Plus, each set includes 15 challenge activities that prepare children for skills at the next grade level. Details:Includes two 50-page books100 lessons on a variety of reading skillsIncludes 85 3rd grade level activities and 15 challenge activitiesRequires 2 AAA batteries (not included)For ages 8 and up