Hi there,
I am NT and have a good friend who's aspie. A few weeks ago we saw a sand picture similar to these (http://www.exoticsands.com/default.aspx) at a local market. He really liked it! They were really expensive though! Anyways, I wanted to get him one and found some cheaper ones the internet. However, the sand was flowing faster, plus they had some glittering sand in them, and I didn't think they were as nice (because of the fast flowing sand it wasn't so calming to look at). So, now I'm wondering if there is something similar I could give him or if you have any other ideas?! He's a phycisist btw.
Thanks for any ideas, highly appreciated!