Another word for levity

Maybe a little levity would help.

Here her unrestrainable high spirits and levity gave great offence to the citizens.

Then he added, with an unsuccessful attempt at levity, "Doesn't this prove I'm looking at our marriage as a long term relationship?"

Many are of opinion that flight is a mere matter of levity and power.

Far from adopting the levity of style too often observable in French romances, the Magyar novels, although enlivened by touches of humour, have generally rather a serious historical or political bearing.