The 1930s marked a number of significant changes in school bus design. Valerie Frizzle embarks on adventures with her class on the titular school bus. They are caught in a traffic jam caused by an incident involving the school bus. Driving a school bus requires a CDL. Edie McCredie drives the nursery school bus. Electronics took on a new role in school bus operation. School bus body production continued until 1995. South Carolina is the only state which owns and operates a statewide school bus system. Bergman apprehends Pinky, who is walking his niece to the school bus. Microsoft Home started publishing "Magic School Bus" software in 1994. Conway was home to one of the world's largest school bus manufacturers, IC Corporation. Kenworth's role in the transit and school bus industry has largely been forgotten. The engine will be available for Blue Bird Vision school bus. After driving a ways, they come across a yellow school bus. Gunner forces Wheeler to stop so he can inspect the school bus.