Playground games are the best: conkers, run-outs, It, drain football with marbles and thumb wars.
But prepare yourself, as Chronicle Books have taken the latter game and pimped it: with lightsabers.
Star Wars Lightsaber Thumb Wrestling does exactly what it says on the tin: just strap on your weapons, insert the thumbs through the pages to ensure a level playing field and you're ready.
Just don't get yoda to start you off: 3, 4, 1, 2, declare a thumb war, I do.
[via Laughing Squid]