Share 'Lapbook Content Suggestions?'

Ok, here's the thing. I have a rather bright 3 year old boy. He's really into Superman so I was going to make a "Superman" themed lapbook of info. he needs to know. Well, he already knows his shapes, colors, alphabet, and numbers (including 1 to 1 ratio). Any other suggestions for what kind of content I can put in this lapbook for him? On the contrary, I have an extremely bright 18-month old who…