I just love this! It reminds me of my eldest son, who used to do this with his car collection, lining them up along the 

stairs and along the living room floor, spending hours playing that way  – and he is not on the spectrum.

When he was older, he started to line up his pencils or order them by sizes, colours or whatever he chose to do.

It occurred to me at that point to ask him if there was a reason for it, to which he replied that it helped his brain

to be more orderly. He is a very academic young man and I am sure this way of sorting the environment helped him.

Has anyone had a similar experience?