Definition: rough, boisterous play.
Synonyms: tomfoolery, fooling around, roughhousing, clowning, buffoonery, fun, pranks, antics, hijinks.
Informal: shenanigans, monkey business, "the brothers' horseplay was not looked on too kindly by Aunt Smitty"
Definition: A room where an artist, photographer, sculptor, etc., works.
Synonyms: workshop, workroom, atelier, workspace, "the artist's studio"