Daddy put the words no no no on the computer screen...it scrolls across it. That's for the upstairs one... my ds last week screwed the one up downstairs... our back up... I think dh is finally going to get a lock for that door. ;O)

We have done pictorial's with our kids. And we got a not available sign and a sign with a circle and a line through it, which resemble NO. We used this on everything they couldn't touch and just reinforced this. And it appears to have worked. I have known other people to have them covered over every switch and appliance in their house. And this has worked for them. Normally the sign is put on a transparent plastic square, so you can use other photos and put the not available on a food or toy that your child can't play with or eat at that time.

Also if you can't go somewhere that you normally go to, you can put the not available sign on a picture of the place or even a photo of a person if they aren't around and your child wants them. It seems to calm the anxiety a bit. But always give them another option. Hope that helps.