What is Bloo?

I bought Happy Meal for lunch on Thursday after seeing a little kid holding this –

Blooreguard Q Kazoo

YUPS! BLOO!! Haha. So I showed scotchey this picture on Friday after HP204 tutorial and she asked,

What is it?

I answered that it’s a character from Foster’s Home for Imaginary Friends, so it’s an imaginary friend! Then she asked again,

Okay, I know. But what TYPE of imaginary friend is it?

Erm…I couldn’t answer that! Bloo is neither a monster or a human or a fairy ! It’s more like a blob of blue gloo? Haha.

Anyone has the answer to that question?!