These pin-style magnets meant to attach a paper note to a metal surface are a choking hazard and do carry this warning. I purchased them since a friend had given me one. While useful any small child would be attracted to the bright plastic color and may swallow it - a dangerous situation. I would not recommend this product and urge extreme caution - as swallowed magnets are life threatening for anyone.
I like the combination of magnetic strength and small size. They don't cover up the item I'm trying to hold in place. Having a small spot of color is a nice touch but it would be nice to have an option of an all clear pack.