8:00 AM is not too early to begin dressing for the game. Nothing says "Tiger fan" like wearing your cap while eating your cereal.
If your aunt says she is a Twins fan, do not take her seriously. She has not so much as a towel with a "T" on it. However, when you sit behind an entire row of people from Minnesota, you are allowed to die a little inside. Boredom is the best choice when choosing your outer attitude. Close second: get very involved with eating your ice.
Your team is winning, and the game is a little boring, so point out your dad's office building to the visitors. Don't act too interested when they ask questions about what you want to do in high school next year. Enthusiasm is for the lame. Save it up for when you kick their butts at both hearts and Rock Band later in the evening.
You can allow yourself a smile or two during the day, as long as you're not like totally obvious about it.