See, I've been in American childproofed homes. I've even been part of the process of childproofing them. And when you have to take out those outlet covers by digging your fingernails underneath - and then wait a couple more days for the nails to grow to appropriate electrical-cover-taking-out length you get a little frustrated. You might even be tempted to say "just let the little bugger put his finger in there. They'll learn."
That's the background for the following demonstration.
Here is the European outlet cover
And the accompanying key
First go to the closest European outlet you can find,
and push the child safety cover in.
When it's time to plug in your iron, stereo or popcorn popper simply insert the key into the keyhole in the center of the cover,
turn the key,
and pull it out.
Ta-Da! Believe it or not I haven't been able to find an American equivalent on a simple google search. American inventors, here's your opportunity!