For a wedding
The minute they said yes.
The registry is full of plates. This is not on it.
Pick the minute it happened, put their name on it, sign it from yours. From $9.99, and $19.99 for the plan that adds the certificate.
Why this one works
A wedding list is a solved problem and a solved problem makes a forgettable present. The couple will not remember who gave the fourth serving dish.
They will remember the minute, because somebody read it out and somebody else cried. Putting that minute somewhere with their names on it is a small, exact thing in a day made of large, general ones.
It works from anyone: the best friend, the colleague who could not come, the aunt who wants to give something that is not money in a card.