They would get fat.
the planet would be a fun place
you would get arrested.
They would have children together, I suppose.
The world would be very lonely if there was no love. There would be no children and the world would be down.
Children would be working in sweatshops and nobody would have a living wage.
We would no long be able to have children and humans would die out.
Children would be working in sweatshops and nobody would have a living wage.
our children would never see a real live bat
If toys did not exist, children and their parents would invent them.
Nothing "would happen". There are lots of things that might happen, depending on the exact circumstances.You would probably find it difficult to do this without their permission, though.
You seem to be under the impression that it is illegal to have guns and children. It is not.
Tracking systems may be put on children to insure their safety, and if anything were to happen to them they would be recoverable. Tracking systems would be a great way for parents to know where their children are.