A Pacific Science Center membership is a Seattle necessity. Not only will it give you free entry for a year to an awesome science museum (with an awesome contained toddler area), in the month of April you can use it at the downtown Seattle Spaghetti Factory to get one free kid’s meal from Sunday-Thursday with the purchase of an adult’s meal (max two per table).  One more bonus of having membership: if you head north to Vancouver for a visit, you can enjoy the Telus World of Science for free and it’s another great place for the wee ones on a rainy northwest day.