> On Thursday 17 Jun 2010 5:36:42 pm Steve Thomas wrote: >> I don't see the need for this tile.. On Thu, Jun 17, 2010 at 6:15 PM, K. K. Subramaniam wrote: > The tiles were created to help kids explore mirror symmetry using stamp- > forward/turn-flip-stamp operators. I think we have crossed wires - this question is about the "listening" tile.