i think a 2 years old child dont have any sense. you have to keep a good eye on your child and stop doing that. after some time your child will learn not to do that.
If you mean he has cerebral-Palsy , we have a forum for that where the posters probably have much more experience then we do. This is the link,
http://www.medhelp.org/forums/Cerebral-Palsy/show/197