by TsukiNoKemuri » Wed Jul 10, 2013 2:08 pm
I think you're right about the mailbox... I see the word "post" (ポスト) in the text. Not sure about the tile puzzle... I had been thinking it was some sort of matching puzzle, where you put the picture piece in the space that has, say, the item's name or first letter or color... but then I spotted a used version of this item, missing a tile, on an auction site and there was nothing underneath.
Aaaaand I just asked my friend in France; he confirms the mailbox/post box, and he doesn't recognize that specific tile puzzle.