About this 3D model
A figurine model much like the character of Starchild in the 1980s animated series "He-Man and the Masters of the Universe" episode "The Starchild." Features a version with simple articulation at the waist, shoulders, and legs. PLA+ is suggested for most parts for strength and slight flexibility. Simply align the connector on parts with the notch and fit into place. You may find it easier to very gently push the male connector on inwards ever-so-slightly before pushing into the female notch, being careful not to snap any of the connectors. Alternatively, I've heard dipping the male connector end into boiling water for a few seconds can soften the plastic, making it easier to insert.