We play Hide'n'Seek in our house on a regular basis. We've had small-scale games, with just the three of us, where my girl has fits of giggles, never stays in her hiding spot, and I pee my pants from laughing. Oh, and the dog. Ha! Don't even think you can hide without her telling on you. I can't tell you how many times one of us had been hiding near her, and she starts wagging her tail or looking in your general direction as the Seeker is seeking.
We also have large-scale games, with Grandpa and Monkey Matt involved, or Grandma and Aunt Angel. Again, I almost pee my pants and she giggles her way through the game. We always find her, no one ever finds me in my favorite hiding spot (shhhh! Can't tell you, just in case you ever come over to my house and we suck you into a game!), and we all end up out of breath and smiling.
She's found another hiding spot, but hasn't had the chance to use it in a large-scale game.
Do you have any silly games you play on a regular basis with your family?