Sometimes this job is just too fun--and this is one of those times. Although I know you're all very serious hard-working types, you should have some fun too. I recently found a book on building robots for the real novice, and thought, "Wow, my readers would probably love to be heroes to their kids (offspring and inner)."
So, to foster science/math curiosity and impact the future of the earth, single handedly boost the relationship between you and your child, and just because I'm a nice person, over the next couple of weeks I'm publishing Chapter 4 of the book--The Absolute Beginner's Guide to Building Robots, by Gareth Branwyn, on the Industrial Control Designline under the title: Build a Robot with your Kid.
Beginning with Robot Anatomy (don't worry, younger kids can peek too), the chapter concentrates on types, motion, power sources, shells and software. There's even a quiz at the end to see if you (eh, they) were paying attention.
So dig out robot pieces from household and garage clutter and become an overnight hero. Naturally, this chapter will just whet your appetite for all of the information found in the book that will be necessary to really build your robotic wonder.
Once you've created your masterpiece, send photographs of your finished projects!