Quilt 3
The red and yellow papers are the quilt units,
and the blue squares are inserts that fit into
the quilt units.

20 quilt units(black)
and 20 inserts
 
 
 
 

It seems I am not the only one who has "created" this unit.
I have come across this unit in a couple of other places.
Although, they did not use the unit for creating quilts.

 Octahedron