I think it would ...
have many flavors & colors coming out.
have natural exotic juices or ... SODA (I vote soda).
have a floral scent (rainbow of flowers).
be able to "dance" with music (like the one in Vegas) and we could run in and splash and dance along.
go 200 feet high.
go half a mile around.
we could play and splash in it and get wet to draw the fountain.
have a portable arcade under the fountain.
have crazy characters.
give you a wonderful imagination when you drank the water.
So, readers, what are your ideas? Let's continue the conversation in the comments!