Invitations can request gifts pertaining to 'older' person's items. These gag gifts could include a white belt, denture cream, sock suspenders and magnifying glass. A comical cake can be ordered.
maybe it would fun if it's like a game of limbo rock were every one could enter and test ther flexibility in passing each stage. it would be fun to have some hula challenge. the party would be like some Hawaiian event. limbo is fun in every age of your visitor.
