Earlier quoted context omitted.
You should get them some full body Kevlar and chain mail as well. There are more shootings and stabbings than bicycle head injuries. Just to be safe.
Curious what sources you have. Because several family members and I have experienced head injuries riding bicycles, none of us have been shot at or attacked with a knife. That said, I'm down for making all private gun possession illegal.
There's like 27000 bicycle head injuries in the US.
I'm surprised you haven't googled it.
Here's the head injury source. You can easily Google shooting and stabbings per year and add them together. https://www.nsc.org/safety-first-blog/bicycle-safety-statist...
Its pretty clear you should pick up some Kevlar and chain mail for your kids.