I made a 'Dora the Explorer' Sawtooth for one of my granddaughter's.
The center square is 6 1/2", if that could work.
the pattern's at:
http://quilterscache.com/S/SawtoothBlock.html
and the one I made is at:
http://www.quiltingboard.com/posts/list/20199.page
This also shows the Warm Wishes 'Bugs' quilt I made for my grandson.
:-)