scmnhh,
Great idea!
My elder daughter always want me to carry her now and I will say "mami has baby now, 妹妹呀!” She will look and touch my tummy. Then, I ask her say hi 妹妹. She is only 14 months, not like 行行 can talk and reply, very sweet and funny..
yee.. I found that my due date is very close to you!