Cut them out and piece them together. They stand, just like real animals would!
Great for role playing games too.
This one time, I played the part of the Griffin and Unicorn. Together, we poked the Cyclops' eye out, dropped a book on top of the Minotaur, threw a (lit) match down the Dragon's throat, and tied the Hydras' necks into knots, all before Medusa turned us into stone... good times.
Printable: Bestiarum Minimum