Hi..I am from India .My son has a problem with rocking body while layin down in bed and even while standing and also when there is music coming from television.He has not yet started talking,he just mumbles few words but definitely understands all things what we talk to him.When his demands comes like drinking water,he asks for it by showing me towards kitchen to take up glass on his own and many other things like taking bath,etc.My humble and heartfelt question is that In this age ,is he normal that he is doing rocking body side to side in bed and while standing also when looking at lights?Will it go off or any medical suggestion need to be seriously taken?