Credit for this lovely rendition of Hello Babies/Friends & Goodbye Babies/Friends goes to Kathy MacMillan, a librarian, American Sign Language Interpreter & signing storyteller.  She’s written numerous books for librarians and storytellers on how to incorporate sign language into stories for children.    You can check out her YouTube channel at the URL listed below:

https://www.youtube.com/user/kathleenmacmillan/featured