Amazing and fun to use kit tests your reaction! Simply depress the ?start? button with your finger. Eight bright LEDs begin to flash in sequence. Then as fast as possible press and release the ?stop? button with the same finger. Your reaction rating is indicated by the label next to the bright LED which remains on!

Have contests with friends to see who has the fastest reaction speed. Do you react with ?Lightning Speed? or ?Turtle Speed?? Our colorful kit will tell you. Features adjustable speed control to set difficulty level.