Teach your baby the sign for the word blanket in baby sign language with the following description and video.
Hold both hands in front of the body at waist level with the fingertips pointed down. Raise the hands to the chest while touching the fingertips to the thumbs in the motion of pulling up a blanket.
Acredolo, Linda & Susan Goodwyn. 2009. Baby signs: How to talk with your baby before your baby can talk, 3rd edn. New York: McGraw Hill.