In a doctor\textquotesingle s waiting room, there are $$6$$ seats in a row.  Mr Spencer arrives with his $$2$$ children.  He wants to sit between his $$2$$ children.  $$3$$ other people arrive who do not mind where they sit.  How many different possible seating arrangements are there of the $$6$$ people? 
Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Questions Involving Permutations and Combinations 