I have a three light switch panel in my living room. One of the light switches turns everything in the living room off..instead of rewiting I would like to buy a cover to place over the one switch to prevent anyone from turning it on or off. I don't know what they are called or where to get them. I do know they exist though because I have seen them. They are a small piece of domed plastic that screwes over the light switch. can you help?

The last time I searched for these I found a number of them. But I was not that lucky this time. Could not find the magic words to search on.

Found these two.

http://www.sharpesafety.com/catalog/product-display.php3?ID=952
http://www.wallplatewarehouse.com/9pp100i.html

I think that the latter style (or similar) are available at some hardware stores and places with Kid safety supplies.

You found them! I spent four hours online trying different websites and search criteria. Thank you so much.