Metal Muncher - Hippo funny Author:Kathy Henderson Something strange is going on in Sib's house - spoons, spanners, stool legs, saucepan lids, belt buckles and buckets keep disappearing. Sib has cracked it. The mystery culprit is small, round and gurgly, and hasn't a tooth in his head. But no one will believe Sib that baby Throg is a metal muncher.