"One of the most creative teacher aids ever developed! Add more fun to any learning experience with the Hot Dots Power Pen! Touch the pen to a 'hot' dot, and the Power Pen responds instantly with lights and any of four positive reward sounds; touch to a 'cold' dot and hear a 'BOING' indicating an incorrect answer. Hot Dots provide immediate feedback turning any practice session into instant learning fun! Make your own self-correcting quizzes, flash cards, or other customized classroom materials. Make your own games, self-correcting tests, and activities on any surface with this set of 300 'cold' and 150 'hot' self-adhesive dots and the Hot Dots Power Pen. Use on flash cards, quizzes, or study sheets for independent, self-checking lessons. Peel 'em - Use conductive ink dots to create games and activities for anything! Stick 'em - Turn any surface into a learning activity! Play 'em - Hot Dots Power Pen responds to conductive ink dots with positive or negative sound and light effects!"