Hot Dots add exciting electronic lights and sounds to practicing Addition. Kids "zap" their chosen answer on the card with the Hot Dots Pen (sold-separately) and learn as the Hot Dots Pen rewards them with lights and sounds for correct responses and "boings" for incorrect ones! This set focuses on two and three-letter word families, including the 37 most common words. Guide features instructions and activity suggestions. Grades 1 & up.