Do you mean the singing game? i learned it like this:

Ist das nicht a cuckoo clock?
Ja, das ist a cockoo clock!
Does it nicht go tick-tick-tock?
Ja, it does go tick-tick-tock!
Cuckoo clock, tick-tick-tock,
Oh du schone, oh du schone, oh du schone Schnitzelbank!

then you keep adding silly words that rhyme, as long as you like. hope this is what you meant.