Super expensive ($40/a pop) but looks very nice as well. Something to try for a day.
If you liked the Acetarium, you're going to love...
Camping very close to Seattle accessible on bike with little kids!
A pene-enclave right near Seattle. I can't believe I missed this!
LeiLani writes for this blog at least sometime. And it looks great.
Going to miss it this year (2013) but I'll try to help out in future years.
Nice selection of rides hosted on "Ride with GPS" so these include GPX tracks and maps and turn sheets.