Cost: Free

What to expect: A classic fair including kids' activities, a tractor show, hot-air balloons, various walks and races, a parade and fireworks.

Why to go: The Milk Drinking Contest. It's a chance to bounce back from the ugly gallon challenges you did back in high school.

Additional info: This festival takes place in Harvard's Milky Way Park. Also, many events -- including the Bed Races -- take place before the weekend of the fair. Check the website for registration details.

Centerstage Reviewer: Ben Rubenstein