Walgreens offers Instagram prints!
You will need to download the PRINTICULAR app for the instragram prints. This is different from the regular Walgreens app. Based on feedback, some photo techs at the walgreens store may not know about 4x4 prints. Additional information about the instagram prints and discounts can be found here
Instagram prints are great for scrapbooking, smash books, project life, etc. Enjoy!