If you say it loud enough

We took part yesterday in a village church event,  I’ll post more details soon.  As on similar occasions we’ve attended it seemed acceptable to wander in and out of the venue, let your phone ring and to chat quietly during proceedings so it wasn’t too surprising when a young boy,  about 10, tapped Mr FF on the shoulder and asked if we were English.  He seemed delighted that we were and confirmed this to the friend who appeared beside him.
They obviously wanted to practice what they knew, starting off with hello, they proceeded to do you like pasta, a few things we didn’t understand and they told us their names, all with huge smiles on their handsome little faces.  I asked them if they knew the children of some of our friends, yes they did and asked me how to say best, they were best friends.  The conversation turned to them asking me how to say various things until they had me stuck at supercalafragelisticexpialidocious.  It’s the same I said, e lo stresso, we say supercalafragelisticexpialidocious too.  Yes they said, but how do you say it in English.