Selected models whose license allows printing and sharing (CC0, CC BY, CC BY-SA). Each lists its author and a link to the original.

A platypus with a bendy body and tail and a springy bill you can squeeze. Prints in one piece: the joints and springs come off the printer ready to move, no supports needed.
Print

An articulated jumping spider with big eyes; print the eyes in a second colour if you like.
Print