old china, ornaments etc of little value

trinket; decorative piece

(a tendency towards) a sudden change of mind or behaviour that has no obvious cause

sudden change of behavior

a brief fashion, interest

craze

frivolous behaviour or character

silliness, childishness

an activity done for pleasure during one's free time

pleasurable pastime

(the capacity to cause or feel) amusement

comedy, funniness

a sudden desire to act without thought about the consequences; a short increase in strength, force

drive, resolve

something said or done to cause amusement

fun, quip

an odd act or behaviour

oddity of personality, way of doing something

a strange, unusual act or idea, especially one for which there seems to be no good reason

caprice

a sudden desire or idea, often something unusual or unreasonable

sudden idea