Yesterday, a bunch of smart kids headed over to the Executive Mansion for the White House Science Fair, and one contraption in particular caught the president's — and the press' — interest: an Extreme Marshmallow Cannon.
The 14-year-old inventor told the president he probably couldn't demonstrate it, because "at 30 psi, it will go 176 feet." Still, Obama insisted and the two helped launch a marshmallow in the White House. "Secret service isn't happy about this," Obama quipped.
Watch below to see Obama's priceless reaction.
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