The worker does not need a Check
Based on your answers, the worker does not need a WWC Check because the contact with children is incidental to their work.
Section 9 of the Working with Children Act 2005 defines child-related work as work in any of the occupational fields, involving contact with a child that is direct and not incidental to the work.
If the work or duties for this position change, go to 'Do my workers need a Check?' and answer the questions again.