Build early literacy skills – and kid confidence! - with the Hot Dots Alphabet Set! Preschoolers practice letter recognition and formation all by themselves with 72 colorful letter lessons and an interactive Hot Dots Pen. Kids simply press the pen to any answer dot for an immediate audio (mutable) and visual response – green light and congratulatory sounds for correct responses, red light, and gentle redirection for incorrect answers. Hot Dots Pen requires 2 AAA batteries, not included.