Rediscovering the pom pom

I have been rediscovering the pom pom,

For the classic round pom pom, I found the technique I learnt in primary school still works the best- two circles of card, or similar, with a hole in the middle- my experiments with commercially available 'pom pom makers' made shaggy or slightly rectangular pom poms. Now what to do with a room full of pom poms??