I found a frame at home goods with 5 slots for 4x6 pictures and decided to use my own B+W photos. The kids and I searched around for things around the beach that looked like letters. My kids were very creative, and were very helpful; my son saw the umbrella as a 'T' and my daughter cold see the lamp post looked like an 'r'.
It is easy to change color photos to black and white because it is an option on the photo site after you upload them. We used CVS photo and the pictures cost around 2 dollars.
Grade: A
Skill Level: Low
Difficulty Level: Low
Frustration Level: Low
Price: $-$$