Cost: $10 adult advance tickets; $5 children; $12 at the door for adults; $7 for children

Organizer: Chicago Humanities Festival

What to expect: This year's 20th annual fest is all about laughter - what makes us laugh, and why. Guests include Matt Groening (creator of "The Simpsons") Harold Ramis (director of "Caddyshack" and other films), graphic novelist Chris Ware, author Barbara Ehrenreich (Nickel and Dimed) and former Labor Secretary Robert Reich. Check the festival website for the full schedule.