malleable

capable of being shaped or bent or drawn out

Capable of being extended or shaped by beating with a hammer, or by the pressure of rollers; -- applied to metals.

Lat malleus: hammer

“Could anything be so monstrous, when one can see that he is malleable to the twist of your little finger?”

— George Meredith, Complete Project Gutenberg Works of George Meredith

“It uses figures made of clay or a similar malleable material to create stop-motion animation.”