This is an incredibly designed play area. My 10-month-old crawled the length of a hanging walkway enclosed by vertebrae bones, sat in a treehouse entranced by Tegu magnetic wooden blocks, whooshed down a slide carved out of a log, stuck a toe in a steaming-but-cold water fountain (she wanted to play there, but I didn't have a decent change of clothes), watched a turtle treading water, donned a conveniently placed little poncho to get fresh air on the roof garden, couldn't look away from a water tornado while we took a break in the cafe, and interacted with kids in a range of ages.
We came in the morning for a singalong and went back again in the afternoon. I can't believe anyone would say their kids find little to do here. I live in Seattle and would practically buy a plane ticket to let my babe climb that crazy rope thing when she's old enough. What a special place.