Targetted advertising

Thought I’d put my Google Adsense code into a couple of my old web games to see what they come up with…
Rock, Paper, Scissors – a web version of the classic game.
Throw a snowball – Seasonal script that lets you throw snowballs at people over email.
The adverts on the rock paper scissors page were for wrapping paper and the snowball ads appear to be for a C/C++ programming service and an online shoe shop.