"Το σάντουιτς του παιδιού"

[civisco]

would it be acceptable to say το "to του παιδιού σάντουιτς?"

[nauajos]

Only in a literary and poetic context; e.g. Η του Διός δύναμις, i.e. The force of Zeus. This kind of syntax was more common in older times (note the language being somewhat archaic in my example)...

[troll1995]

No, not really. This is classical greek syntax.

[civisco]

yes, that´s why i was asking. thank you.