I kind of love the idea that there are little angelic children hanging around the Danish Court, seeing into people’s ulterior motives and such. It might be an interesting production to have them actually visible – not just in THIS moment but at other moments when someone is delivering a lie. We’d call it the Cherubic Hamlet and it’s just chock full of little chunky children with wings, checking out the scene.
The other thought I had was; What if cherubs are freshly born angels? That is – are they the newly dead? When a person dies and they go to heaven, what if they came in as angel babies? In which case, that cherub would be Polonius who would very likely in fact know what Claudius’ actual purposes might be.