Well, this isn't unique...
But for my daughter's b'day party I had chocolate fondue set up with strawberries, pineapple, bananas, apples, and marshmallos - and i set the ice cream and coole wip out beside it. SO they got to make their own kind of sundaes. But they got to feel more "grownup" doing it this way.
(Her party was a makeup party, with sodas served in champagne - plastic- flutes)
Very Hollywood elegant feel. They loved it!