<qa>  What is the subject classified as Level I or II?- The subject classified as Level I or II is able to walk indoors and outdoors and climb stairs holding onto a railing but experiences limitations walking in crowds or confined spaces. Subjects classified as Level IIIs need to walk with assistive devices and have limitations in their ability to ambulate outdoors and in the community. Children have at best only minimal ability to perform gross motor skills such as running and jumping. 