Practice first grade level reading skills with Hot Dots, the interactive activity book. Press the electronic Hot Dots pen to an answer dot and get instant feedback; the pen lights up green for correct answers and red for incorrect answers. The pen also plays sounds or can be muted for quiet learning. The pen does not talk or provide answers. The activity book covers essential first grade reading skills like letter and vowel sounds, reading comprehension, sight words, and more. Pen requires 2 AAA batteries (not included).