What can I do to help my 2 year old son who is ready to use the potty, but is afraid of it? I've gotten him his own potty chair but he still is afraid to sit on it without a diaper on underwear on.
This is a common fear -- and one that can only be lessened by time, support, and space. Let your son explore the potty -- both the big one and the little one -- on his own terms, and in his own time. Eventually, he will want to "copy" the way others use the potty, and his natural desire to use the potty will kick in.