Jinny Beyer: "A tessellation is a shape or combination of shapes which will indefinitely cover an area without any gaps or overlaps. Even though we tend to think of tessellations only as interlocking motifs, any quilt block that repeats itself can be considered a tessellation. But it is interlocking patterns that are intriguing, and once you know how to create them, a whole world of design will open up."
http://www.jinnybeyer.com/quilting-with-jinny/tips-lessons/detail.cfm?instanceId=2141577C-0324-E8C6-1F88CFCEC9808ADD
This here is an absolutely amazing book about tessellation quilts, I guess it is out of print because I only got it at an antiquarian bookshop and in German: Jinny Beyer, Tessellation-Quilts entwerfen, (Schäfer 2001) it's absolutely fantastic.
Here is why I find these tessellation minis so interesting:
The thing is that you only get an IDEA of what the pattern really looks like, not more than that -
only a small section is to be seen, and the rest is .... you have to find out the structure by yourself: each tiny part is extremely important and is a part of a shape which is a part of a shape...and this goes on and on and is much larger than the piece in front of you, but you get the feeling: this pattern is something big and lovely!!
I find that intriguing - and I sometimes think it's like what happens in real life, too :-)
These minis are about 8,5 x 8,5 cm (about 3 1/2" x 3 1/2")
handmade, they can be hung up or sewn onto something or put into a frame... but there is also a piece of (removable) magnetic vinyl fixed onto the back so that they can be used as magnets.