How do you communicate with a baby when they are not yet talking?
🤔🤔🤔
Augmenting non-verbal communication (gestures etc) through sign language can be beneficial for both parent and baby. There are several signs that I like to teach and this can be done starting at four to six months of age. 
Ones I like to teach are: "all done," "more," "help," "milk," "eat," “pee” and "thank you."
👶👶👶
Knowing when your child feels done with an activity can prevent tantrums and ease transitions so teaching them sign language is especially beneficial here.
😉😉😉
How do you teach sign language? You model it as much as you can when it applies. Continue to pair the sign with the verbal command until it catches on.