« My dear twins,
Do you remember the treasure hunts your mother and I used to organise, when you were young?
You just loved them.
Well, this year, for you anniversary, I offer you a voyage back in time.
By form and substance: a treasure hunt of colors of the past.
I love you.
Well well, you think you know the answer?
You don’t know when the letter has been written.
Might there be another clue over there?
You like those kind of games.
It’s the weekend, it’s summer. You have time to spare.
Why not go there?