Some worksheets I prepared for an 8-year-old child: the first is a drawing of her Barbie[TM] doll:
and the second is a monster we prepared by picking different animals for the body, head, legs, tail. As it has the body of a horse and the head of a unicorn, it was agreed that this is, in fact, a form of a unicorn, and therefore it farts rainbows. The name is a combination of animal names – pig, unicorn, bird, shark. When I can I will update this post with the coloured versions, I will do so.
EDIT: Coloured versions.