One bit of advice is put as aside several hours to do this, my experience is takes quite a while to build (that might just be me though). It is worth it, when you see the head, eyes, etc moving it is very engaging.
The site has links to all the software needed and some very useful sample programs.
This is nice engaging robot that comes with a user-friendly programming language. The finished robot reminds me a bit of Cynthia Braziel's Kismet robot (http://www.ai.mit.edu/projects/humanoid-robotics-group/kismet/kismet.html) from MIT in the 1990s. So this might also be a good introduction to the area of social robotics and, as at the time of writing this, only £99, a relative inexpensive way into this area.
All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with.