So, I've done this one before, but I thought I'd mix things up a wee bit.
So, we have:
Louis, Dauphin of France, b 1661.
Philippe of France or Henri of France born 1664
Marie Therese of France born 1667
Louis or Philippe of France born 1672
So, with this in mind what butterflies emerge from this? Is Marie Therese married off to Carlos of Spain when they're of age, is Louis XIV's second considered a potential heir when it becomes apparent that Carlos won't have children? Who could the second and third sons marry?