If skies are cloudy or the lines too long at the Space Needle, walk a few steps to the Seattle Children’s Museum, which turns out to be the interactive experience the Experience Project might have been. Exhibits and installations are heavily biased toward the hands-on and playful, with a Construction Zone, Story Telling Circle, Mountain Forest, Cog City, and more offering kids plenty of opportunities to get down (and dirty, truth be told). Admission is $8.25 for adults and children over the age of 1, $7.25 for grandparents, and free for children under the age of one.