Building a Dinosaur

Brian has been moving dirt to fill in around the shed where the skunks, oppossums, and raccoons have been living.  Xavier has been helping and finding "fossil bones."  Today, he decided he had enough bones, so he was ready to build a dinosaur.  He was pretty confused about how to get the bones to stay together, so Brian explained that since we're just regular people and not archaeologists (or paleontologists), we just lay them out and someone else nails the bones together.  He got out his Dinosaur encyclopedia and started building...

Xavier and Anna's books:

 He started by lining up his "fossil bones"

 Trying to figure out how they go together:

Anna did a little more research while Xavier checked out what he had:

 He was very confused about why he couldn't just build a dinosaur...