When babies start kicking, grasping, lifting their heads or sucking on a soother, it is all an important part of their daily “fitness regime”, because the muscles in their legs, arms, backs and even in their faces too, have to develop and be exercised. The interplay between an agile tongue, powerful jaw muscles and a correctly-shaped roof of the mouth is an important requirement for healthy, trouble-free breathing, problem-free feeding and, later, speech development.