Learning Resources Farmyard 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 colourful buzzers each with a familiar farmyard sound for easy differentiation – cockerel, cow, horse and dog! Buzzers feature a picture of the corresponding animal on the buzzer button. Buzzers measure 9cm in diameter. Each Answer Buzzer requires 2 AAA batteries (not included). Suitable for ages 3+