b) Go to http://merry.starbucks.com/en-us/#/bogo/and click on "create an e card" on the bottom right hand corner. Take a picture of the 4 object on each ecard: The squirrel, the reindeer, the skater, and the boy with the dog. It helps to select the image and then click to go to the next step. If you wait for the animation to end, the phone should recognize the image.
c) Once you found those 5 objects click on "characters" on the right hand side of the screen and go to "collect your egift" and then input your email address.