Dear Aquinasfan,
My own experience is that these sorts of displays aren't large in number.
As some folks have pointed out, there is one large stationary display on the route. You can see it from a distance, and change your path a little and have a good chance of missing it altogether.
However, I've let my sons look at it from very early ages, and though it's very upsetting, it drives home the point what the day is about. We were disappointed that we couldn't make it this year, as I had urgent business matters to which to attend. It's a tough day, uncomfortable, physically unpleasant for much of the time. Yet, my 8 year old was pretty despondent that we wouldn't make it. My two sons know how serious this all is. The ugly pictures, regrettably, help make the point.
Very sad stuff.
sitetest
Hmmm... I think we underestimate children.