Answer:

FUN

Answer	Crossword Clue
FUN	Source of enjoyment
FUN	"We Are Young" band
FUN	Grammy winners with a period after their name

FUN	"Jealousy is all the ... you think they had": Erica Jong
FUN	Disneyland attraction
FUN	Enjoyable
FUN	Enjoyment
FUN	Like a hobby
FUN	What homework usually isn't
FUN	When tripled, song involving a T-bird
FUN	Frolic

FUN	Kicks
FUN	Pleasure
FUN	Good times
FUN	"... With Dick and Jane"
FUN	"Ain't We Got ...?"
FUN	Partner of games
FUN	Merriment
FUN	Disney World experience

FUN	Jollies
FUN	Barrel contents?
FUN	Entertainment
FUN	... to be with
FUN	Disneyland experience
FUN	Kicks, so to speak
FUN	First word in the first crossword
FUN	Grammy-winning "We Are Young" band

FUN	Laughs
FUN	Games partner
FUN	A good time
FUN	Play purpose
FUN	Playfulness
FUN	A blast
FUN	Word three-peated in a Beach Boys song title
FUN	Like a barrel of monkeys?

FUN	Said three times, a 1964 Beach Boys hit
FUN	Word with park or run
FUN	"Girls Just Want to Have ..."
FUN	Merriment.
FUN	Sport.