Yes, if you can get them to. It tastes like strong swimming pool water. As for safety, if they swallow some of it, it turns to ordinary table salt in the stomach. Chemically it is Socium Hypochlorite - NaClO... Drop the Oxygen and you have NaCl... salt. Sodium Chloride.
You DO have to make it fresh every time you use it. It does not keep.
Thanks for the advice and info, Swordmaker. I think the kids will use it (they swim a lot and who knows how much of that water they actually ingest!). Good to know that it has to be made fresh (I was actually thinking of making batches weekly). Now, I know that isn’t good. You did a great job on this post.