That hiding candy (or other things people wanted) was a universal property of grandmothers.
English is not my first language, but I had heard the expression “search all nooks and crannies”, but thought the last word was grannies - cranny is an unusual word.
Now,my own grandmother was in the habit of hiding candy for us to find. I thought the expression existed because all grannies hid things. Search all nooks and grannies!
Honestly, I’d try that just to put my name on the page of that record book.