This one was harder to take than one might think at first sight.
This collection of singles by Massive Attack was released when I was just a little girl (1998) and his box was pretty innovative for that time because it was reagent to heat: it was all dark but if you warm it up underneath there was hidden a drawing. I used to love it when I was little (nothing is changed).
So today I decided to let Charlie walk on it and her little legs impressed their footprints. Then I had to be very fast, because the effect last few seconds. This is the result.