Steve B wrote:
I was just sent a cell phone picture of my two grandsons, five and seven, on
their new Christmas present, an ATV.

I am very troubled by this, having expressed my feelings on this heretofore,
and knowing that the strong willed son-in-law would do whatever the **** he
wanted, thank you very much for your input months ago.

Nothing much to add except that this might
be useful. They can at least call for help
if they get hurt:

http://www.findmespot.com/en/index.php?cid=101

Lots of pilots are carrying them and think
highly of them.

What about motocross helmets and body armor?

My folks didn't allow unsupervised trail riding
until I was 14-15.

Good luck.