LEGO Technic Maybe?
This is a book i have and really like.
Each page features a small inset of one of 16 creatures, along with an abundance of related facts. But the real focus is on the animal's robot twin-and here Kelly and his cohorts pull out all the stops. Tongues firmly in cheek, they draw cutaway views to show each creature's "innards," and explain, from an engineering angle, the function of each part. The rhino robot, for example, has "solid casing to protect the computer (very thick skull protecting the brain)," and "dual food processors (stomachs)." The chameleon sports "protective sleeves for visual receptors (eyelids)" and "flat video screens" that "show camouflage patterns (skin cells called chromatophores lying beneath skin scales).
Your post also made me remember a computer game called The Incredible Machine.