Not quite on topic, but you mentioned childhood photos - quite a few years back, as part of a fundraising charity thing, all of the teaching and other staff brought in childhood photos, and they were displayed (safely behind an Acrylic sheet, so no graffiti could be added to spoil the originals) and pupils paid a tiny sum to try and identify which Teacher etc. was which child. At end - and two got ALL right - current photos were put by each childhood one, for a few days, and provoked even more comments. Pupils simply couldn't get their heads round black-and-white pics, or what children wore - "In the Olden days, Miss, when you were young"