Nanodots Add Safety Features

Wired:

The things that make Nanodots so awesome are also the things that make them enticing and dangerous for young children. It is easy to see why they would be attracted shiny playthings, especially if the child sees older siblings and parents playing with them. It’s the shiny factor that Nanodots has addressed first with a minor change in packaging.
The retail package has always had an emphasis on safety with high-contrast warnings, 14+ age indicators and clear labels warning that the product is not for children. The new change allows the end caps to be assembled into a compact and opaque container. The NANO container retains most of the package’s warnings and can be just a little stubborn for smaller hands to open.
The next feature, AversiveTech, addresses what happens when a child does get a hold of some dots and tries to swallow them. AversiveTech is a patent pending technology developed by Nano Magnets that puts an extremely bitter coating on their new colored dots.
My son unwittingly volunteered to taste the coating when I asked him to touch them to his tongue. He spent the next 20 minutes spitting and sputtering, even after washing his mouth out with water and eating a bowl of ice cream. They sure are gullible at that age.

Sounds like he's trying to win father of the year.  I'd hate to see toy magnets go away.  They were something I loved playing with as a kid.