I wouldnt bother with them personally, i put £15 quid in and got a quid back out. And in a week, i got addicted i just wanted to go back and play more to try and win but i didnt thank god. Id go with the money rinser bit
If you do like a bit of a gamble, i tried the ladbrookes site, on there is a game called balls and its like the lottery, but you can bet with as little as 10p a go. Its cool...and i didnt find i got addicted either.