Was worried about how easy these would be to remove for my child based on some other reviews. I watched him attack a outlet for 2 minutes and he didn't even come remotely close to being able to pull them out of the socket. My second concern was the quality of the plugs, if they were cheap the prongs could easily snap off in my outlet upon removal. However, these seem to be made pretty well, and after continuously removing one it never even cracked. Definitely going to order some more for the rest of my house, and worth spending the few extra $$ over the super cheap ones on amazon.