I have no idea how accurate these are but Damian Thomas pulled a great feat of replicating the shape and structure of a few prehistoric monster skulls using LEGO Technic parts in white. What we have are the skulls of a Dilophosaurus, a Triceratops and a Tyrannosaurus Rex in the respective order below. They’re all so good I can’t decide which is my favourite. If you’re lovin’ all things prehistoric and composed of calcium goodness, the closest official set of an arrangement of bones from LEGO  is the recent 21320 Dinosaur Fossils Ideas set.