In another how-do-I-get-there story: a good friend of ours from the Philippines also helped us arrive and take the right train in Paris. Thank you to facebook messenger, I was able to message and ask for information on what train to take because when we asked google-- nothing came up on our question of "How to get from CDG airport to Paris city center?". As a way of paying it forward to fellow travelers from someone on the receiving end, here are some information on how to get there.
From Paris CDG airport train to Paris City Center. From CDG Terminal 2, Take Line => RER B (Blue) RER B Train, Direction => Paris (Robinson, Antony, St-Rémy-lès-Chevreuse) Arrival Stations => Gare du Nord, Châtelet les Halles, St Michel/Nôtre Dame, Luxembourg, Port Royal, Denfert-Rochereau, Cité Universitaire Ticket => “Billet Ile-de-France” Aéroport CDG – Paris (Zone 5 -> Zone 1) Cost => 10€ (adult fare) / 7€ (children 4 – 9) / free (children under 4)And yes, please don't forget: if you are taking the subway right after taking the airport train, (as in our case we need to go to Anvers station after arriving at La Gare Du Nord, you do not need to buy another ticket at the machines, you can just go through directly to the subway i.e. Line 2 if going to Anvers etc.) This will save you and your family the trouble of buying another ticket you will not need and save on time and money upon arrival. Safe travels. God bless. This post is a big "thank you" to all the travelers who helped us along the way. Little information goes a long way indeed! Keep on traveling! :)