I think a childrens' charity based in the UK.

And definitely not a big organisation that can afford to run it's own media campaign.

Like the idea of a raffle as I think we could raise more money that way. I think the tickets should be £1 not £3 as previously suggested. I would be inclined to buy 3 for £3 but not 1 for £3 if that makes sense! I think more people would buy them if they were cheaper.