Arnold

Arnold is a character from Adult Magic School Bus. He is the adult verison of Arnold Perlstein from The Magic School Bus. The character is portrayed by Noah Grossman.

Adult Magic School Bus
Arnold and the class are back together after picking up Carlos. Still entranced by Ms. Frizzle, Arnold does not mind being stuck curled up on the floor of the Hyundai and continues smiling as the vehicle takes the group to their destination. The group goes to "Ms. Frizzle's House" as Ms. Frizzle talks about gravity.

Arnold and his class then start packing up Mrs. Frizzle's stuff until Ms. Frizzle's ex-husband Mr. Frizzle and his girlfriend show up. The class then leaves the house carrying as much out as they can and Ms. Frizzle plans on using the Magic Hyundai to end her husband's life. Arnold did not go along with the idea, so he was "dead and buried". His friends are horrified about his death, but they are about to go into Mr. Frizzle's body and re-inflate, ultimately ending his life, so Arnold is not mentioned again.

It is left unknown on how Arnold died. However, it is possible that Ms. Frizzle killed him off-screen as a result of Arnold's disagreement on Ms. Frizzle killing her husband, and possibly to get revenge on Arnold for disliking her field trips most of the time.