You do know that your son is to cute for his/your own good, right?
The stories of what others kids got into remind me of my oldest now 21 when he was learning to walk.
He took a very great interest in where the movie went when you put it into the VCR (Yes, that long ago). After being told numerous times to not put his hand into the front of the VCR, I decided the only way he was going to learn was the hard way. So, on his next attempt I let him.

Yep, that's Jason, going for the VCR.
Once his hand was in there he discoverer that the door wouldn't let him go. Left him with his hand in the VCR for a minute or so. Was harder to keep his mother from coming to the rescue while he learned his lesson than keeping him from his original plan. After I opened the front flap on the VCR so he could remove his hand he never repeated his attempts.