The boxes were bought from Hobbycraft, then covered in a PVA/water mix and then painted white and blue. Not sure what the papers we used were as they were all from our growing piles of patterned paper. I used weathered wood distress ink to add to the papers.
I am really pleased with how this turned out. I got inspiration for this from a box I saw at a garden centre which had 3 boxes for first tooth, first curl, hospital bracelet. It was very expensive so we decided to make our own.