Luckily these Super Mario Singing Glow Stars showed up from Japan at just the right time. Put one of these little beauties on your desk and anytime you need protection just hit the button on the back. The Star flashes on and off and plays the invincibility song just like the Super Mario Brothers game. Voilà! instant invincibility for the duration of the snappy little tune.
(Of course, what I'd really like is a mallet that played the Smash Bros. music.)