Babies often want more of something but do not yet have the words to ask for more. Teach your baby the sign for the word more in baby sign language with the following description and video.
Form the hands into the flattened letter O. Hold the fingertips together in front of the chest. Pull the hands apart.
Beyer, Monica. 2006. Baby talk: A guide to using basic sign language to communicate with your baby. New York: Jeremy P. Tarcher/Penguin.