Hi all.
I've decided to take part in a small show, basically open mic. It will be on an elevated stage and the crowd will be between 300-400. Unfortunately for me stage magic is out of my realm I've only really done closeup before, so I'm looking for some help

It's only a 4 minute slot so just one trick/routine. I'd need something that involves a good bit of audience participation as well as something visual. I'm sort of drawn to some sort of mentalist effect although I'm no mentalist so it would have to be mental magic or perhaps I could work something around an impression pad? Anyone with any ideas or recommendations of any type of routine that has a good wow factor would be greatly appreciated. Thanks.