Finally, after much feeding, the baby has grown into a full Dino! Dinos can eat almost anything, including things with spikes. In order to do so, they must have very tough stomachs. Yellow Dinos have very long necks, which they use to reach and eat food located high off the ground.

Ubi Sum is confused. As his name would suggest, he doesn't know where he is. Nor does he know what he's for. He does (luckily) know what he can eat—pretty much anything—and how best to reach it. He likes to eat rocks, an idea he got from a book he found called The Big Red Rock Eater. He's yellow, but that didn't stop him. So the fact that he can reach high on the cliffs for specially crunchy ones is useful. He likes the ones with fossils in them best. And he washes them down with big gulps of lovely sea water.

He also likes to dance the Soft Shoe Shuffle—but no-one else seems to.