Many years ago, some friends and I participated in an event, wearing clown costumes. Instead of carrying a cluster of balloons, I had inflated (new) pastel coloured condoms. These became lovely big "balloons", which I offered to passers by. They were greatly admired by the ladies until someone told them what they were.

A word of caution, should you ever decide to try this, a "balloon" that size can almost blow your head off, if it explodes while being inflated.