Mary, regarding your question on how to package magnets, here's 2 ways I've done it. I've used the lid of smallish food containers (think like a paint can, where you prise off the lid with something). I covered those in paper matching the 4 small glass pebble magnets that I put on the metal and then into a bag.
Number 2 is that I punched circles into cardstock and the magnets fitted into the holes eg, all you saw from the front was the glass pebbles and all you saw from the back was the magnets. The cardstock then went into a bag, and they didn't move around. Of course, this is dependent on you having a circle punch the size of your magnet!!