So my daughter is 5 months and a week and i've only ever heard her laugh once... that was 2 weeks ago but never again! It wasn't me that made her laugh either is it normal? She is an incredibly smiley baby and will talk (scream) to herself and us for hours
My son is the same. His laughs are very rare. I can coax a giggle or 2 out of him. He rarely laughs tho not a full on belly laugh. Just keep trying. Flipping my tongue in mouth to make sounds gets him going.