One of the things I did with my children that they loved was to sing and sign songs to them. You can incorporate the signs you learn into the songs you sing with your child, and I also showed a few of the songs my children loved in some of the videos in the Baby Sign Course (you will see these videos below):
Video #1 – Signs To Start With starting at the 5:19 mark (the counting song and then a song I use for distracting a child (when they are fussy, etc) “Did you ever see a fish …”),
and on Video #2 – Farm Animals at 4:50 “Old MacDonald Had A Farm”.