"Tooth Shaking"

Yesterday night, Joel came running to me. Telling me happily "Mummy, look my tooth is shaking already!" Then he used his finger to "shake" his front lower tooth to show me. Oh yes, it's really shaking. He was smiling at me. So i asked him why is he so happy. He said "that means my big boy tooth will be coming out soon". This is because his favourite cousin, Ryan "ko ko" has got some teeth missing already so I guess he is happy to know that he going to be "bo gay" (toothless) like his Ryan "koko".