Since they are for the kids, Id probably go with either another 19, or a 17. The 19's can use the 17 mags, and it keeps things simple. If youre going that route, get one for yourself too.
I gave each of our boys a High Power for their first handguns, and I had one as well (still have it). HP's are great guns and good shooters, and have one of the most comfortable grips for a wide body, especially for smaller hands. Again, its also a plus when everyones guns take the same mags.
SIG's are also great guns, and the P226 is one of my favorites.
“The enemy is anybody who's going to get you killed, no matter which side he is on.” ― Joseph Heller, Catch-22
Beware of associating with "Cheap" Squirrels. They tend to be very narrow minded, hypocritical, and will gag you if you question or disagree.