Northwest Trek is just an excellent way to spend the day as you drive along and have animals come right up to you (sometimes scary animals) and eat straight from your hand.
This is a great park with alot of animals. The price is about $10 for adults, but it's cheaper if you live in Pierce County (note: if you're not from Washington, Peirce County is not the county that Seattle is in).
Just a short drive south of seattle and tacoma. Nice place, interesting animals. highly reccomended
more