Re: Cognitive impairment examples

You'll need to define aspects you wish to address.
ie why would it be difficult to use.

http://www.pmld.org runs in ie5.5, and not much else.
It is designed to be 'accessible' to nearly everyone, and those with profound and multiple learning(cognitive) difficulty. 
it is based on a bigger and better product 'splatter' created by members of a UK group: Computers and Multiple Impairments, CAMI. http://cami.co.umist.ac.uk/
Splatter is designed to help users learn about cause and effect. 
click to start

Anything more complex than this will possibly be inaccessible. 
However we all have particular interests, and a cleverly designed site may help individuals gain experience.

jonathan chetwynd
IT teacher (LD)
jc@signbrowser.org.uk