Puffer Nuts

You may have wondered of late where one has been.  Here is the answer:

You will be pleased to hear that I was given a number of jigsaws that had been found at the dump.  I have had to work through them all!  Naturally a number of them had pieces missing but this one is complete.  So a photo was taken and the jigsaw was destroyed and taken to the Charity shop for re-cycling.

Now what was the meaning of the word ephemera?