30 Degree ball
Geometric and other shapes | David Brill |  Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 4 | Square
30 units | 
Folded by Francesco Mancini |
Cat
Mammals - Felidae - Cats | David Brill | Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 21 | Square | 
Folded by Gilad Aharoni |
Cheese
Food | David Brill | Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 24 | Rectangle - 1X2 | 
Folded by Gilad Aharoni |
Dragon - flapping
Imaginary beings - Dragons | David Brill | Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 14 | Square
With flapping action | 
Folded by Gilad Ayalon |
Fairy - Tinkerbell
Imaginary beings | David Brill | Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 25 | Square | 
Folded by Gilad Aharoni |
Fiddler flexagon
Toys - Action Models | David Brill | Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 30 | Square
4 units
An action toy | 
Folded by Gilad Ayalon |
Fox head
Mammals - Canidae - Coyotes, Foxes and Wolves | David Brill | Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 8 | Square
Great for wet-folding | 
Folded by Gilad Aharoni |
Horse head
Mammals - Equidae - Horses and Donkeys | David Brill | Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 28 | Square
Two simple and one detailed variations | 
Folded by Herman Mariano |
Mouse
Mammals - Rodentia - Rats, Mice and Rodents | David Brill | Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 16 | Square |
Folded by Gilad Aharoni |
Racing car
Sports and Athletes | David Brill | Dave Brill - Selected Models 1997-2004 by David Brill (read full review) | 11 | Square
3 units | 
Folded by Gilad Ayalon |
