Learning Resources Original 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, pink, green and orange) each with a unique sound for easy differentiation – honking horn, boxing bell, doorbell and boing! Buzzers measure 9cm in diameter. Each Answer Buzzer requires 2 AAA batteries (not included). Suitable for ages 3+