On a Frecciarossa train from Milano Centrale to Bologna Centrale I take a closer look at the print-out of the ticket...
Adults and boys? Do girls travel free then?
I see exactly where this has come from though, the Italian ragazzi, which is used for the word 'children', mostly when referring to children around 12 or above. However ragazzi can also translate as 'boys', as it's the plural form for ragazzo, 'boy'.
But still, check with a native speaker next time eh?