This weeks theme is timewasters:
Here's a way of keeping your brain active without having to buy a Nintendo DS: Lipton Tea have a Brain Train site.. check it out if you have a spare hour or two..
Register at Gamehouse online games and get free game called Super collapse. I first found this game when I was in the UK, and at the time had to pay for it. I did... both in monetary terms and by losing hundreds of hours in precious time. However if this one doesn't float your boat there are plenty of others to choose from.