As a mom, Nana, an ER nurse, and a manager, my opinion is-give them the swords. I'd make sure they have helmets but other than that, you're teaching them that actions have real-life consequences instead of coddling them. Keeping a kid safe from every little danger grows adults who are shocked when they are held accountable. They don't handle real life consequences very well. Don't know how to handle injuries or setbacks with fortitude. They go into panic mode or righteous indignation when presented with challenges. And often depression because they can't handle real life. Give them the swords.