I have also created a new page for the puzzle under the materials section of the website. This is where you will find games that use the puzzle. The first game is up already (dictation). As we use the puzzle I will determine if we need more of some symbols and less of others.
On a side note, but still related, my 4 and 5 year olds saw the puzzle drafts that I had printed on plain paper and decided to cut them up before school yesterday. In the afternoon I helped them make an interval symbols chart. They are very into "projects" right now and this definitely fulfilled that role.