I'm reading "The Brave Little Donkey" to the kids and get to a passage where the donkey's mum dispenses advice.
"You have the three donkey gifts: your bite, your kick and your loud bray."
"What's a bray?
- Do you know what a bray is, Nico?
- Yes I do, it's when a donkey... Err... Umm... Uh... *takes a deep breath* HEEE HAWW!"