Western Bridge's group show from now through the summer is made up of "major installations and small cool gestures," according to director Eric Fredericksen. It sounds like an adventure course, with installations including space-eating balloons by Martin Creed, a hanging periscope by Eli Hansen and Oscar Tuazon, a bounce house by Mungo Thomson, a large tunnel by Andreas Zybach, and Jeppe Hein's little hole in the wall with air blowing through it. All that's missing is us. (Western Bridge, 3412 Fourth Ave S, 838-7444. Noon–6 pm, free.)