Annual Addition limits

Pretty sure I know the answer to this one but just in case ... 401k/PS plan- owner gives his 2 kids (they do not work there ever - they have other full-time jobs) the max 401k and accompanying SHMatch every year.  They are on the payroll so get W2s.   They do not contribute any 401k monies where they actually work, but can they get a profit sharing contribution from both this plan and their actual plan?  No need to comment on the legality of this - been down that road with them.  TYIA! 

Yup.