Student or Learner
Parent: We've only got 5 minutes left before we have to leave. You don't have enough time to play.
Child: I want to play.
Parent: We've been through this before. When the 5 minutes was up you didn't want to stop. You just don't get enough satisfaction out of playing for 5 minutes.
I know the underlined phrase could be left out, but I just want to ask if there is a more natural way to express that thought.
Not a teacher.
You could say:
Five minutes is just not enough.