From the Seattle Parks and Rec Website:
Powell Barnett Park was clearly built with serious play in mind. With a children's play area, complex climbing structures, a wading pool in the summer, basketball hoops,and a broad field ideal for frisbee - there's something in the park for kids of all ages. There are benches and picnic table throughout the park, and ADA accessible restrooms in a wild castle-shaped build next to the play area.