Ouija boards, Truth or Dare, friendship bracelets, hair braiding: is there anything not to like about the slumber parties of our girlhood days? So instead of your next girls' night out, how about making it a girls' night in with our ideas for throwing a sleepover for grown-up girlfriends. We've found the entertainment, home goods, and treats you need to throw a fun overnight party with your favorite ladies. Here are the essentials!