Thinking to implement the technology used by Sifteo Cubes I did a number of considerations.
First of all, I think that the three cubes are few for the purpose of use of a dyslexic child and that if the number of them increases we need to find a way to make them easily portable.
So I imagined to use the cubes, but to make them stackable through the joints. In this way, by stacking 8 cubes, is possible to built a particular character that the child can comfortably carry. Then I decided to include also two arms that when combined together become a pen for capacitive screen.