Non permanent tattoos?

Well I'm a real sissy and don't think I could put up with having a real tattoo done. But I know when I was little I bought these Powerpuff Girl sweets that came with a free tattoo that you could put on by adding water and stuff. I think it's quite cool but is there any that look quite real and not babyish? How much do they cost and where could I get them from? I live in the UK. Thanks =)