Children of movie stars attend birthday party in Hollywood

Title card: "Stars' Tots Go Gay! Hollywood -- Wesley Ruggles Jr, just 2, sets a birthday spread! Guests are kiddies of filmdom's brightest stars" / children ride on whirling machine, girl rides by in front of machine on pony / closer view of children riding on whirling machine / Manny, son of Edward G. Robinson, dressed in cowboy suit, rides rocking horse / Arline Judge, wife of director Wesley Ruggles, while sitting holds twins of Bing Crosby, with little Gary Crosby their brother on Arline's right and her son Wesley in clown costume standing on her left / children sit around table eating / CU little Irving Thalberg Jr and Miriam Hopkins' son Michael sitting at table eating / actress Helen Twelvetrees bends over son Jacky at table and helps him eat / CU Joan Bennett's daughter Diana and her sister Constance's boy Peter sitting at table eating / Wesley cuts icing off birthday cake, his mother standing next to him / Note: exact month/day not known