its not a very good song, but as a child i learnt one that went

when a dinosaur's feeling hungry, he looks for food
he looks in the forest when hes in a hungry mood
when he looks in the forest he finds lots and lots of trees
when he looks in the forest he finds lots and lots of mice

and he say yum, trees, and he says, urgh, mice
and he says yum, trees, and he says, urgh, mice

i only mention it as we get to keep the tree theme going as well...