Layrolls to catch meddlers

As a small child when I asked my Grandmother, What is that?", she would often reply, "Layrolls to catch meddlers.". What is a layroll (spelling?) and what is the orgin of this phrase?

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It is "layovers to catch meddlers on".
I don't know the history or origin but the "layover" would be an item placed by a parent or grandparent in or on an out of the way or hard to reach shelf to "catch a meddler" or inquisitive kid looking for a preview of a Christmas present.