I think there's a good chance Anand has Restless Leg Syndrome, based on his symptoms (and the fact that I have it). Poor munchkin. It's not too severe, but it does disrupt his sleep. Since it's underdiagnosed in children, I'm passing this along. Kevin, please take a look when you get a chance.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1785221/