I have a (lapsed) stamp collection but this one is new out over here today... unique so they say... a 10 stamp collection but 4 of them are lenticular...
All Gerry Anderson stuff (Thunderbirds, Stingray, Captain Scarlet, Joe 90, XL5 and Supercar)
If you hold then right they work as a countdown as per the beginning of the show (Thunderbird 5 being the back drop even works...)
Somewhat "sad" to admit to being quite excited by these...