Since all the Slackerjacks have been unusually violent lately, we've decided to pare things down a little with our old friend mental arithmetic.
Because that's what Guesstimation is – it's essentially a summer fete game in electronic form. You're shown a collection of objects and you have to guess how many there are. You can't count them – there just isn't enough time – so you have to have a stab in the dark. That, in a nutshell is Guesstimation.