The Elephant in the Sukkah by Sherri Mandell
Henry, once a happy circus elephant, feels lonely and sad at the farm for old elephants, where nobody wants to hear him sing. One evening, he follows the sound of music and singing to the Broner family's sukkah. At last, a place where he might sing. But Henry cannot fit inside the sukkah! Ori knows it's a mitzvah to invite guests, and he gets a big idea about how to include Henry in the Sukkot fun.