Open the box. There is a very dirty plastic disc in the center that makes it very difficult to see the color. By pushing the pencil straight down as shown in the pictures, both the disc and the top and bottom halves can be removed. To test the color change (all wrapped twice in polythene, once individually and again as a set) I took 3 beads. and put it in a pyrex beaker and dripped a few ml of water from the sink. As soon as they turned green, they shattered into small pieces. This would pose an extremely dangerous choking hazard if ingested by pets or children as the tiny and sharp parts can actually leave a lot of damage. Unfortunately it is a bit difficult to stick the plastic disc on the back as it is quite hard. While resorting to a piece of tape. There doesn't seem to be any way for the beads to fall out of the way other than through the central viewing hole when the plastic disk is removed and the two halves fall apart. Just in case I'll glue the sides but the metal seems to be holding up well so far
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