To bugger up your formula...
Add one child under 10 - Said child will insist, bride, whinge and generally annoy all adults into giving the child ALL the cack prizes from whatever box of naff crackers you bought this year.
For even more fun...
Bring 2 children under 10 into the mix - 2 children will fight over the shite toys that fell from crackers and in general cause all adults to moan and shout and finally confiscate shite toys so that, "If that's the way it's going to be, I'll bin them all and nobody wins any!"
Biting the hand that feeds IT
