Learning Minds Lights & Sounds Answer Buzzers (Set of 4). These fun, colourful buzzers turn any activity into a game while keeping even the youngest children engaged! Set includes four brightly coloured buzzers (blue, red, green and yellow) that light up when pressed. Each buzzer features a unique sound for easy differentiation – siren, game-show, laser and charge! Buzzers measure 9cm in diameter. Each Answer Buzzer requires 2 AA batteries (not included). Suitable for ages 3+