"La Cucaracha" is a traditional Spanish folk song about a cockroach (la cucaracha literally translates to “the cockroach” in English) that loses one of its legs, making it difficult for the roach to get around. It is unknown when the song came about. It is also very popular in Latin America. In Mexico, it was performed widely during the Mexican Revolution.
And here's the backing track. You can use it to practice, to play it on a concert or to make a YouTube video with you playing the trumpet.