For those of us of a certain age, Rodgers & Hammerstein’s Cinderella is a nostalgia trip. The memory of this musical, a television landmark in the ‘50’s lingers as a singular pleasure. My fear in bringing young people, Noah (8) and Hannah (6), to a recent matinee was my losing composure and singing loudly along to “Impossible,” “In My Own Little Corner,” “Do I Love You Because You’re Beautiful?” Another concern: would it be as good for them as it was for me? To date, critics and awarders seem in thrall. Even though this is a Broadway debut, the musical has 9 Tony nominations as well as nods for other major awards, as a musical revival.