I am obsessed with edge painting (when color is applied to the edges of cards, invitations, books and so forth). It adds such a pop of colour/shine to design. I don't think I've seen a hologram-like effect though until this morning.
‘This Many Birthday Card’ – The candle “flame” is blind-embossed for you to colour in the appropriate number of candles for your birthday friend, unless your birthday friend is over 100 years of age. The card designer clearly has no love for centenarians.