A spectator of mine gave me this idea.
Spec: "Got any tricks for me?" or "Show me some tricks!"
Magician: "You want tricks? Here." (Pull out a small box of Trix Cereal).
If you can find the little sample boxes in the super market, you could just have one of those with you, but it would just be dumb to carry one around all the time.
So what if you just had a handful of Trix, and you used a sugar packet and a TT to make "some Trix" for the spectator? I think that would work, as long as you have a way to keep the Trix from getting smashed.