Clumping Cat Litter

I have had cats for a very long time.  Growing up they lived outside for the most part.  But since being  being married we have had several cats that live in the house.  Some choose not to do their business outside.  I would like to give a hug to whoever came up with cat litter that not only smells good, but clumps up and makes it easy to clean out of a litter box without throwing away the whole thing.  Genius I tell you.