Answer:
He brought back percussion instruments comprising guiro, bongos, maracas and claves.
Explanation:
George Gershwin went for a two week vacation in Cuba precisely in February 1932 during the prohibition era. He fell in love with the Cuban music that he had to spend sleepless nights doing it.
On his return to the United States, he brought back percussion instruments (namely guiro, bongos, maracas and claves) to aid his Afro - Cuban sounds.