Rehome the skin kids. They aren't listening, they keep laying on or landing on the poor doggie's back, they are not trainable. They need to be in a dogless home; or in a home with no dog over the age of 4. If they keep this up, they will be PTS, as they are hurting a living being and that is just not right for them or fair to them. It's not their fault they aren't trainable.

You could try putting up a doggie gate to keep them away from the dog, but they could possible jump over that and get into more trouble.

Have you tried cookies? Sometimes, using cookies as a treat reward, you can retrain them and get their behaviour the way you want it to be. But that takes time and patience, not sure you have that luxury here. The dog could be hurt in the meantime!

Maybe keep the kids safe in the bathroom or in the basement; have you considered tying them out in the back yard? That way, the dog approaches them if and when the dog wants to and the dog is kept safe. The kids stay out of trouble while you figure out what to do.

How about a behaviourist to get through to the kids? Sometimes what the parents can't do a trained expert can.

Then there may also be a psychic communicator who can get through to these young kids using their language skill level. That may be another way out.

What about building a barrier around th ekids so that they can't get too close to the dog without the dog knowing they are in the vicinity? then the dog can just leave the area if it wants to; like putting a bell on a cat, ya know?

Hey a football helmut would work, it would protect the kiddo's face from the dog's muzzle. That is another thought. You can get them with padding so the kids won't feel a thing while they are wearing it.

I bet other PT'ers will have some ideas.