We avoid politics as a rule, and weapons even more so; but from time to time there are reasons for exceptions.  The photo above represents one such occasion.  Click it to go to the source, which captions the photo:

President Obama reacts as 14-year-old Joey Hudy of Phoenix launches a marshmallow from his “Extreme Marshmallow Cannon” during the White House Science Fair.

Or see a short video with a bit more detail here.  At moments when discovery and innovation are being celebrated by political leaders, we make exceptions to the rule, especially when the process is fun.  And when a President steps back and let’s a young scientist show off, even better.  Weapons of mass confection, anyone?