Hoo-dini

Alright listen up, lil' buddy. You see, it's a play on words. "Hoo" is what an owl says, and "Hoo-dini" sounds like "Houdini," who was a famous magician. So, the joke is saying a magic owl would be named after a famous magician, but with an owl twist. You probably think that's how owls say hello, because you probably failed biology class.