There's something about puppets—from the Muppets to ventriloquist's dummies to the venerable old Sharpied sock puppet—that triggers someplace weird in our brains. All weekend long, Puppet-O-Rama takes over Seattle University, with classes for puppeteers and affordable open-to-the-public puppet shows. Today's events include The Amazing Mysto's Magic Show and a family-friendly play about Beatrix Potter, but there are adults-only shows on Friday and Saturday night, too, ensuring a weekend full of entertaining, slightly creepy thrills for cheap. (Seattle University, 901 12th Avenue, Various times, $8–$10.)