Jesse hasnt laughed yet at all either. He can talk his head off and gives us lovely big smiles but never had a laugh. He does open his mouth really wide with a smile as if he should be laughing then but no sound comes out (just read your post that Kiara does that too! ) . I just put it down to that every baby is different and will reach each milestone when they are ready.. some will come faster than others. As long as he still gives us that cheeky grin then it doesnt bother me