You are confusing the support test for a qualifying child with the support test for a qualifying relative.

Qualifying child:  Must not have provided more than 50% of his own support.  Are either of these kids providing any of their support?  Maybe they are child actors.  You don't give their age.  But Dad doesn't have to be providing more than half their support. 

Qualifying relative:  To claim one of these, yes, you have to provide more than half the support.  But a qualifying child can't be claimed as a qualifying relative, and you wouldn't want to do that anyway. So put that rule out of your mind.  

Then you get into some tiebreaker rules if both parents want to claim the child. But if they agree on who claims each of the children, you don't have to worry about that.