Hi!

If you are planning to travel to Seattle, an ORCA card works like a clipper card, making public transportation easy to access!
https://orcacard.com/ERG-Seattle/p1_001.do

I recently travelled with my parents who are visiting and have 3 cards that we used (1 per person). We travelled for two days using regional day passes ($8, not included with card) that are only usable with the ORCA.

Except for the Monorail from downtown to Seattle center, the regional pass with the ORCA card is accepted on all public transportation within Seattle city and the Puget Sound coast (Kings county metro, Sound transit).

While the card is available for $5 for adults if purchased from within Seattle, I can give them away for $3 each. And they can be picked up from the Gates Computer Science building on campus.