I don't want to give away too much, so I'll leave it up to you, the reader, to figure out the function of my robot for the book. It can be built using 1 NXT Retail Kit OR the combination of 1 Education Kit and 1 Resource Kit.
1. It will produce something that you can show your friends.
2. It's final product can be reproduced, over and over, with infinite variations.
I'll post a follow-up screenshot of one of the book pages soon, but in the meantime, keep your eyes open for some of the other contributors to give you a first look at their book contribution(s). Special thanks to Jonathan Daudelin for creating the CAD files for me - the building instructions look great.