Making a Wooden Toy Dinosaur (Spinosaurus Part 2 )

So I have my idea, a Spinosaurus toy. Now, what? Well, I came up with a list of what I want him to do.
1) He is a biped, so I want his legs to be jointed and move on wheels just like the other dinosaurs.
2) His sail has to move like the dimetrodon toy but with a more horizontal than vertical...