Seattle
Seattle is nicknamed the Emerald City (for all the evergreen trees), but it could also be called "the city of hills and lakes." Downtown Seattle is perched on hills that go up and down, ending up at the waterfront and Elliott Bay; Lake Union and Lake Washington are two large freshwater lakes. And day or night, kids can't miss Seattle's unique landmark, the Space Needle.
Greater Seattle
Museum of Flight - This museum is chock full of full-size planes! Climb into the cockpit of a Blackbird or Hornet fighter, take control in flight simulators, test your piloting skills in a hang glider, operate the controls of a Scorpion helicopter, step inside Air Force Once. Little kids can land soft airplanes on their own play runway. In the Airpark are historic airplanes, such as Fokkers, B-17, the Concorde, F-14 Tomcat, MiG 21, Spitfire. Open daily, this stellar museum is located next to the Seattle-Tacoma Airport.
Here's our own Travel for Kids hand-picked list of family hotels, all styles and price ranges, convenient to fun things to do with kids in Seattle: