a barrel of (laughs|fun)

a person or thing that is considered a source of fun or entertainment for others

The idiom "a barrel of laughs" originated in the early 20th century and draws upon the image of a barrel, typically associated with containing a large quantity of something. It signifies an abundance or an ample supply of laughter or amusement. The phrase is used figuratively to describe a person, event, or situation that is highly entertaining, enjoyable, or humorous, often suggesting a lively and light-hearted atmosphere.

The comedy show was a barrel of laughs; the audience couldn't stop laughing throughout the entire performance.
The company's annual party was a barrel of fun, with games, music, and laughter filling the venue.
Spending time with my friends is always a barrel of laughs; we share jokes and funny stories that keep us entertained.
The children's birthday party was a barrel of fun, with a clown, face painting, and a bouncy castle.
Despite the rain, the outdoor concert turned out to be a barrel of laughs; the band's energetic performance and the crowd's enthusiasm created a festive atmosphere.