You play with fire and you're gonna get....

So the other night we were putting the kids to bed and my husband asked my five year old what his favorite part of the day was. We'd done some really fun things and had had a good day as a family, and we figured he'd say something about spending the day at the lake, or playing at the park. But no. Instead he said he liked when my oldest (11) took these:
And this:
And made this:
So we had a good long talk with DS 1, and had to show him pictures like this:
to try to get the idea through his head that he shouldn't be doing any of the above. Sometimes it worries me just a little (or a lot) that my child seems to have no executive functioning or impulse control.

How do you manage a child and teach them responsibility? It's moments like this that make me think I might have to follow him around every moment of his life for the rest of his life.