my baby is 7 m old..I noticed something different about my baby the days.. when I try to make him sleep his stomach on my lap by shaking my leg. his tummy begins to sound like a bag filled with water.. is it normal?

A. yeah.. first reason could be that she is cold. babies cannot regulate their body temp well so they easily overheat or cool. put her in a light full length cotton pant or leggings. cover her feet with socks. secondly, depending on her age, her muscles are not very mature yet, so on and off they tremble a bit.