Inclusion Criteria:  Is 5-17 years of age. NOTE: Participants must be under 18 for the duration of the study. Diagnosed with a neurodevelopmental condition resulting in an inability to functionally ambulate. Can safely assume and maintain a supported standing position Has sufficient upper extremity and function to safely use a PWSD Can communicate pain or discomfort through verbalization, vocalization, use of augmented communication, etc. Can safely use the PWSD in areas of their home Has at least one parent/caregiver who is able to converse in English and actively participate in a device-use education provided in English The PerMobil PWSD can be set up to meet the child's specific needs Medical Clearance to trial the PWSD Participants must reside in Michigan  Exclusion Criteria:  Has a diagnosis of Duchenne muscular dystrophy. Any reason that it would not be safe for the child to use a PWSD