I love COSTCO!
For so many reasons, one of which their photo center has great, great, GREAT prices on large collage prints. I have a 16X20 frame near the front foyer that I like to keep current collages of the family in, and here's the collage I made from Lucy's three-year old shots:
And would you believe a 16 X20 print is just $5.99. I LOVE Costco!