Sir Richard Attenborough was interviewed locally just before the 1994 release they had shown this clip and he talked about the great joy he conjured up by surprising this little girl by by actually signing with her. The moment he had read the script he decided to get a Sign Instructor.
It's even more heartwarming when you know that the little girl didn't know that Sir Richard Attenborough will talk to her by signing. So her joyful reaction is real :-) !
This was a beautiful scene. In the original film, the little girl was Dutch and couldn't speak English. This was a nice homage to the original movie and also reinforced that no matter what nation Santa went to, he was fully capable of speaking any language to a child.