antics, pranks, larks, escapades, stunts, practical jokes, tricks, romps, frolics;
fun, fun and games, skylarking, mischief, horseplay, silliness, foolish behaviour, tomfoolery, foolery, clowning, buffoonery
informal shenanigans, capers
British informal monkey tricks, monkey business
North American informal didoes
archaic harlequinades