game Web sites

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I have a myfamily website that is just by invitation,and I'm trying to make it a bit more fun for the members,I would like to be able to find a few free game sites that I could add for just the members to play.like bingo and scrabble.hopefully some of you maybe have a bit more knowledge on doing this then I do.I would really appreciate any help I can get.I am hoping that I can find some games that will give prizes as well I don't want to put much more money into this site then already have Thanks