Someone recently suggested I use magnets for the closures on my Nightmare Snatcher journals, as I was looking to do a redesign of them. I currently make them with velcro, but this would not work with the new design, and I currently have a warning that they are for 3 and up. I know there are a lot of concerns with magnets, as they can be swallowed and then attracted to each other to pinch the insides of the stomach lining or throat. Is there a place that outlines usage of magnets in children's toys?