The vestibular system plays a vital role in everyday life. The primary, and perhaps best-known, vestibular functions are maintaining (postural) balance by monitoring motion of the head and body and stabilising the eyes relative to the environment. Consequently, the vestibular system plays a significant role in early motor development and several (gross) motor skills. Accordingly, a vestibular deficit leads to problems in the reflexive control of postural and gaze stabilisation, which often results in delayed gross motor milestones, and poor motor and balance development. Interestingly, these symptoms tend to overlap with symptoms found in children with Down Syndrome (DS), one of the most common chromosomal disorders associated with developmental delay and mild to moderate intellectual disability (ID). It is reasonable to assume that poor or limited motor development and performance in children with DS can be attributed to an underlying vestibular problem. Unfortunately, research on postural control in the paediatric Down population has to date not taken the vestibular system into consideration. Therefore, examination of the vestibular function is of paramount importance, especially to improve motor function by applying existing specific vestibular rehabilitation programs in this vulnerable group.