Can you really cross a donkey with a zebra?

Yes, and it’s called a Zebrass! A mule can’t usually have babies of its own because its parents were different types of animals, but donkeys and horses can have babies with lots of different animals. Here are more combinations:
Zebra + horse = zorse
Female donkey + male horse = hinny
Female mule + male horse = hule
Female mule + male donkey = jule or donkule