Webskills such as taking a first step, smiling for the first time, and waving “bye bye” are called developmental milestones. Children reach milestones in how they play, learn, speak,. Webthe introduction of tummy time, the importance, how it impacts the child’s progression, how it helps prevent medical conditions, how to ensure a baby’s engagement in tummy. Webin their resource “tummy time: An important child development milestone,” the early learning institute (teli) provides more information about tummy time and highlights.