The Hot Dots pen works with dozens of Hot Dots card sets, providing instantaneous visual and audio feedback. Simply press the pen to choose an answer on any Hot Dots or Hot Dots Jr. card for an immediate response—cool, kid-friendly phrases for correct answers and gentle redirection for incorrect responses. Grades K+ 

Specifications: 3.75'D x 2.75'W x 6.75'H

Requires 2 AAA batteries (not included).