I have been thinking about getting these at home, as I had them for my older son, and now have a toddler again. But, I have been warned, and then looked online, and it appears that these are actually now considered quite dangerous, more dangerous than not having them. Although it seems counter intuitive, I was convinced, and haven't bought them for home.
However, at work (primary school, infant age) I've just been supplied with a load for the classroom as a safety measure. I'm not totally sure of my ground, does anyone confidently know the pros/cons? I would like to raise this with my boss, but I'm new, and have become unsure again.