The Christmas 'Stack and Whack' I mentioned above does not look like your 'Stack and Whack'.
I've found a website that shows BOTH versions of the block call 'stack and whack'.
http://www.connectingthreads.com/tut...hack__D22.html
But isn't the second version from the above website similar?
Stack and Whack?
Half-Square Triangle Block.
OR
One Block Wonder?
the 60 degree Triangle block, using 6 triangles to form a hexagon.
This website has lots of videos (I don't have time to watch today)
http://ifthesethreadscouldtalk.com/o...utorial-links/
Enjoy!
Nan