R.J.
Some of these are free... Some are über pricey. Some take an hour, some an afternoon, others all day. :)
- Tubing in Snoqualmie Pass (& snowmen, snowball fights, etc.). The pass is a 1.5 hour drive out of the city. http://www.summitatsnoqualmie.com/Activities/Tubing
((Rental clothes are available here if you don't have snow clothes http://rentsnowclothes.com/pricing/ ))
- Ride a Ferry
--- Seattle Science Center & 180 dome IMAX theatre
http://www.pacificsciencecenter.org/
--- Seattle Children's Theatre
http://www.sct.org/
--- Seattle Children's Museum
--- Space Needle
--- EMP (experience music project)
* the 5 long dashed of the above are part of the Seattle Center / in walking distance to each other
- SANCA (circus classes)
http://sancaseattle.org/
- Seattle Aquarium
http://www.seattleaquarium.org/
- Woodland Park Zoo & Zoomazium (indoor playground... The zoo is okay, not spectacular, but fun & the Zoomazium is a good place for 8 & under to run around).
http://www.zoo.org/?mobileview=full
- Museum of Flight
http://www.museumofflight.org/
((Several of the above are group rate priced through SEATTLE CITY PASS gotten here http://www.citypass.com/seattle?mv_source=rkg&creativ... ))
- Ride a Seaplane / take an aerial tour of the city.
http://www.kenmoreair.com/
- Seattle Underground Tour
http://www.undergroundtour.com/
- Tillicum Village
http://www.tillicumvillage.com/index.php
- Ballard Locks (boat elevator, fish ladder, etc.)
http://www.seattle.gov/tour/locks.htm
- rollerblade or paddleboat around Greenlake (rental skates from Gregg's)
- Pike Place Market
- Teatro Zinzanni ... Which is Circus+Dimner or Circus+Brunch (call and check if the current show is child friendly... There's usually a child friendly brunch matinee. But not always.
http://dreams.zinzanni.org/
- Center for Wooden Boats (the pirate ships are in town every couple months)
- Museum of History & Industry
http://www.mohai.org/visit-us/mohai-calendar/eventdetail/...
- Kayaking & Fish Tacos
http://aguaverde.com/paddle.shtml