The first year I took part (January 2012), I had been tatting for only a month. I had never done an SCMR, and I had only just learned the split ring, but I followed along, and was very proud to arrive at the finish line with this goat:
In January 2013, I did the TIAS again, and this time it was a pram. I did it frontside/backside, and so for the first time did backward-facing split rings and split chains.
In September 2013, there was an extra TIAS from Sherry Pence. Again I took part, as you can see from my blog posts for September and October 2013.
This year, I got a late start, but now I have caught up to Day 7 (out of 14, I think). What can it be? My wild guess: the Sydney Opera House. :-)
You can join the TIAS at any point. Do try it — it's a lot of fun!