Zippy was always the naughty, selfish one- that often setup the basis of an episode for a 'what we should learn' talk. He used to say "It's not fair!" alot. George was the pink hippo thing and was shy and gentle and generally cute and loveable. Bungle was the scary chap in the suit that strutted around like his was cock of the walk, very self- righteous. Geoffrey was the peacekeeper of the unlikely bunch.
First aired in 1972 and has had many different presenters and characters.