We did sing and sign. My DD loves it and she actually signed really well from quite a young age (Started at about 10 months). It worked well for us...she was easy to follow too. She spoke later than many of her friends (she was not interested in saying the odd word, wanted to use sentences i think!!) so signing did allow her to communicate well. Even now if we don't follow what she is saying (She makes words up...) she does a sign so we will understand!!