[hitpointdrew]

To middle school student, I think I would say something like "It's an abstraction layer that Cloud Providers offer so that you can hand them your code, this abstraction layer will spin up/down infrastructure on demand whenever your code is requested/called. Underneath it all there are still servers and infrastructure, it's called serverless because you (the developer) do not have to think about or manage those servers, you just worry about your code."