Moo is a do-block that has the power to make someone say "moo". Moo is a boy.

Moo! They call me Moo, that's what I do. When I say Moo, then you moo too. Moo!

Moo is a brown do-block with light brown spots and white horns (representing a cow) and a symbol that has a speech bubble with a cow's head.

You will first see him in Moo.