There's Underground Quilts at the Pike Place Market - lots of local things. Quiltworks Northwest in Bellevue - really fun shop. Pacific Fabrics - do the warehouse on 4th Avenue near Safeco Field - amazing fabrics and tons of yarns and notions. And my favorite is the Goodwill Warehouse (on 6th Avenue near Pacific Fabrics) - you have to scrounge, but it can be worth it if you keep an open mind for how to reuse and recycle clothing, linens, fabric, etc. They charge by the pound! Lots more shops to find and explore too. Have fun.