Riven, if they have veins, and they have blood, they can get DVTs.
That is why operations were such a risk and have come down in risk, because interventions like Clexane injections, TED stockings and encouragement to do simple exercises post-op such as wiggling toes, rotating ankles 10 times, etc.
The same with long-haul flights. There are now leaflets advising passengers to do exercises, take a trip to the toilet etc, hourly.
It's also part of the reason women aren't kept in hospital on bedrest for 10 day post-childbirth like they used to be.
When you or I move our legs, it uses the muscles, and that contraction of the muscle helps put pressure on the veins and encourages venous return. So the blood doesn't pool because of gravity so much. If it doesn't pool, it can't clot so easily.
Do your children not get excersises during the day, then? Not even a massage or a rub? I naively thought they must do that sort of thing as part of a routine, when they change them, for example. It wouldn't take a second to give legs a quick rub.
Having said that, perhaps there isn't the risk I thought there was. I will have a read.