"Child." A person under 18 years of age.
"Motor vehicle." Every self-propelled device in, upon or by which any person or property is or may be transported or drawn on a public highway.
"Structure." A house, apartment building, shop, warehouse, barn, building, vessel, railroad car, cargo container, house car, trailer, trailer coach, camper, mine, floating home or other enclosed structure capable of holding a child, which is not open to the general public.
18 Pa.C.S. § 2910