Is this is the wrong section? Unless you come from a family of ducks.
Duo sometimes adds a sentence from another section to mix things up a bit :)
Ah ok, cheers!
Γιατί είναι "Το παπί παίζει" σωστά;
Would "Η πάπια παίζα" be correct?
No -- παίζα does not have the correct verb ending.