This weekend we took the kids to Cirque Du Soleil, which is showing till June 1st in Redmond's Marymoor park. I must say, although I've been many times before (including once in Tokyo), I hate these things. The acrobats are extremely talented, I grant you, but I find it hard to watch them without a tinge of pain for myself thinking how awful it would feel to twist my body that way.
It was pretty hard getting in to the event, with all the cars coming off 520 on that little exit. If you go on a weekend, I'd suggest coming from the other direction. Exit instead at 40th, the turn left on W Lake Sammamish parkway. There didn't seem to be any cars from that direction, and it's a right turn no stop into the park. Parking is $15.