The Brain O builds is "Learning Resources Brain Model".
I have to confess that we lost the instructions and had to find photos of them online. After much trail and error, we got it together for this video.
The book that O uses to talk about what parts of the brain does what is "How Does Your Brain Work (Rookie Read-About Health)". It is really for younger children. I would say around 5. But that means that she can introduce it for her younger sister now!
