Learning Resources Barnyard Buzzers, Set of 4 Encourage student response with some silly sounds like cock-a-doodle-doo, moo, neigh, and bark. Buzzers help students need to learn to be assertive, teaching them to be loud and direct when they want to voice their opinion or answer a question. Set includes 4 animal buzzers  dog, cow, rooster, horse Requires 2 AAA batteries, not included Ideal for ages 3+