3Inspired by the classic Christmas carol, Joy to the World features a sound chip and light that play when the book is opened. Joy to the World celebrates the birth of Jesus and introduces little ones to His universal message of loving, giving, and caring. This interactive book features a glow light and an instrumental rendition of the carol, which makes it easy for you and your child to sing along. Simply push the button to hear the joyous sounds and take part in the deeper gifts that Christmas brings.