The song "Knock Knock" is a Contemporary Christian Children's song that has aired on various radio programs. This would be a great song to add to Circle Time for a Religious based schooling program or Home School program. It can be used to teach virtues or just for a "brain break" during lessons. It could also be used to teach children what is a basic concept of what Christians believe by focusing on the lyrics. Mrs. Debbie and various talented children performed on the album "Kids Raise in Praise". These songs will be uploaded separately for your convenience so you can choose which ones are your favorite. Others available will be "The Bridge, Raise in Praise, Rain, One, God Doesn't Want a Robot, Holy Express, and Treasure in Heaven". These songs will be free. Mrs. Debbie will also add the sing a longs to "The Bride, Holy Express, Raise in Praise, and One" for a very minimal charge for the purpose of being able to write and produce more music. These sing a longs would be great for music lessons, Sunday School, or Chapel.