Actually, he's probably more anti-social than shy! He loves his teachers and his older brother but doesn't seem to want friends his own age. He does judo at the moment which he seems to enjoy as it's just running about and playing really but I don't think he'll be so keen when it progresses to proper contact.
He's not interested in team sports such as football but I'd love him to do some sort of activity where he can make some friends. Any ideas?