MY DD is 17 weeks and an incredibly happy, content and laid back baby. She smiles all of the time at us (well, at anyone really who pays her attention!) and when she does find something funny will give an enourmous grin and her body language suggests she is laughing but there is no noise if that makes any sense!? She is very vocal with other noises and things so I'm a bit puzzled.
Other parents I've met at toddler groups etc. say that their children give proper giggles and I've seen other children of this age proper belly laughing. Any suggestions?