Fun Fair!

Every summer, from July 5th to August, the Fun Fair appears, seemingly out of nowhere. You never questioned it, and neither did anyone else. Its been like this for years, no changes, even to the people in the fair. When one day.. July 2nd, 3 days to the fair. You get up, get dressed, do you hair, normal teenager things. You go downstairs and head outside to get the mail. As your looking through the mail; bills, bills, scam, birthday card for dad, more bills; then you see it. A red envelope, addressed to (Your name). What could be inside of it?