Riddle Me This

For the past couple of days the kids have been preoccupied with making up riddles for each other to figure out. Most of them are pretty much like the knock knock jokes kids make up. Silly to them, but kind of makes the grown up scratch their head. But today, I'm so proud, my 6 year old boy came up with this riddle all on his own.

What is milky, shaky, and hairy?

I'll tell you all tomorrow...think it over a bit.

UPDATE: the answer is.....a coconut. :D