Pachycephalosaurus

The most core skeletal feature of the replicated Pachycephalosaurus — the ultra-thick, rounded cranial roof bone — reproduces the skeletal mechanical structure of the Pachycephalosaurus: the hindlimb bones are robust, the forelimb bones are short and slender, the trunk vertebrae are short and sturdy, and the tail bones are slightly thick. It adopts 3D-printed integrated built-in joints: the cervical vertebrae can twist flexibly, the hindlimb joints can bend, and the trunk vertebrae can slightly expand and contract. This not only displays the skeletal structure but also restores its ecological behavioral postures. The joints seamlessly integrate with the heavy bones, maintaining the "sense of heaviness" of the cranial roof bone while stably supporting pose adjustments, ensuring that the bones do not become loose during play. It is printed using environmentally friendly PLA material; the "thickened bone plate" on the skull part, through the thickness of the shape and texture details, rep