Back in 1989, on a rainy afternoon, seven-year-old Amy wrote a letter to Roald Dahl. Using oil, coloured water and glitter, Amy sent the author a personal gift: one of her dreams, contained in a bottle.
Here's Roald Dahl's wonderful response:
P.S. Roald Dahl stamps.
(Photo by Palayo Lacazette; letter from Amy herself, who is on twitter; via LettersofNote)