M.M.
My one year old has done sort of the same thing for the longest time. Except instead of the hair twirling, he sucks his thumb and holds on to his blanket. Not just any blanket, it has to have satin edges. It is so nice for them to calm themselves, however sometimes it would be nice for it to be simpler. I agree with the others, start substituting a blanket or stuffed animal....as long as it's something appropriate like that. Let me know what you figure out about thumb sucking!! LOL I think my lil guy will be doing that for a while! :) Take care!