What are some fun things to do around Seattle on a warm Summer day?

Here are few things that someone might enjoy on a warm Summer day in Seattle: walking around Seattle center, taking a trip up to the top of the Space Needle to get a unique perspective of the city, taking a ferry ride to Bainbridge Island to walk around the small town and shop at the small unique shops, visit Green Lake park just north of the city and take a stroll around the picturesque scenery, or visit Pike place market and see the many items venders have for sale.