Got a camera phone? You've got everything you need to participate in Saturday's Chi-Town Hunt Down (subtitle: Where the El?), the State Theatre's new scavenger hunt fundraiser. Beginning at 2 p.m. at the Bean in Millennium Park, the competition will have participants snapping photos and completing tasks throughout the city (follow along on Twitter) before ending at The Wormhole in Wicker Park at 5:30 p.m. Prizes like Six Flags tickets and restaurant gift certificates are involved, of course, but the real winner will be the theatre, which will be raising money for its "urgent, vital" productions. Tickets are $15 in advance and $20 day of (cash only).