Birthday Party Ideas for Kids - http://www.birthdaypartyideas4kids.com/
Features great ideas for birthday themes, party games, activities, free scavenger hunt lists, sleepover guide, icebreakers and invitation ideas.
Party Games Etc - http://www.party-games-etc.com/
Game descriptions, tips and ideas for a variety of party themes. Includes party supplies, printable games and reviews.
The Games Forum, Party Games - http://www.thegamesforum.com/fPartyGames.html
The world's premier party games information gateway. Aims is to bring you every party game ever made, every party game ever played.