Just a sketch, but something like this:
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Someone with better computer graphics skills than I could turn it into a proper logo. I kind of like the idea that it subliminally contains the double-A for Autism Awareness.
Another way to visualize it would be to draw it from above, looking down on the prism from the top, seeing it as a more 3-dimensional pyramid. Anyway, it's not a puzzle piece and it uses the "spectrum" symbolism to reflect the concept of neurodiversity.
Given that this thread was begun two years ago and has only a handful of posts, I'm sensing nobody really cares.
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"I don't mean to sound bitter, cynical or cruel - but I am, so that's how it comes out." - Bill Hicks