A Marshmallow Cannon in the White House

I've discussed marshmallow guns before, specifically the arsenal available from the Hammacher Schlemmer catalog.Well, this week a kid brought a marshmallow cannon to the White House to demonstrate it to President Obama.

Fortunately, it wasn't this child.

An eighth-grader from Phoenix showed off a homemade gun that can shoot marshmallows up to 75 feet. In this video, the president insists on seeing it in action.

"The Secret Service isn't happy about this," Obama says.