I have 2 young children. A reason I started to do trains was that I thought it might be something we could all do together. A shot in the dark, but both have interest, although the younger one (5 yrs old) seems more interested.
I placed the table at a lower height figuring it would be more accessible. It is. It allows them to play with things on the layout. That is fine.
Of course they are supervised most of the time, but understand the consequences of an error - basically getting zapped by the electricity. Has not happened, but they have seen it happen to me (I demonstrated what could happen). If they have friends over I remind them to tell the friends not to touch and we go over the rules with my kids. I am trying to teach them a little responsibility. If the friend or my child breaks something, well that is a risk I am willing to take.
So, the 5 year old had a play date the other day. Afterwards I went down stairs and found a major derailment on the N Gauge part of the layout (it is a circle of track set up to be a ride at the local park). As you can see, major league derailment. The investigator (me) asked the engineer (the 5 year old) what happened. Her answer: I dunno. It was quite funny the answers I got as I probed more. Things like - check with [her sister]; I don't remember; the wind knocked it off. I explained that it was OK, I was just wondering if there was an issue with the train or track so I could fix it. That is when she realized there was no penalty, and that my "inquiry" was about fixing the problem. She then owned up. She just knocked it over when pointing out something to her friend.
I would like the RMT folks to notice that the two Wally figures came through unscathed (see them with arms extended).
All re-railed and operating normally now. Enjoy the picture. The headline for the picture is: "Five Year Old Derails Train at Amusement Park"