Seriously, though, I used to make an audience member float and had that illusion in the act for around 20 years until it just got too much trouble to carry around with the show. (Always a bit heavy and bulky . . . most folks probably don't think about floating as being heavy, but magicians do.) Well, I decided to go ahead and put that effect back into our children's show and we now offer to make the "birthday child" float -- it's great for pictures and a memory that will last a life-time.
There is a bit of a weight limit on the child who floats. After all those "wires" and helium balloons can only hold so much, but we have been having lots of fun with the new illusion. If you would like to have your (small) child float - why not invite Jeffini the Magician to your party. Oh . . . and feel free to throw in some root beer and ice cream. Wiggles the bunny loves root beer floats!!