. >> for his fourth birthday bei bei is treated to giant ice cake tois savor at outdoor ret hom national zoo'sgot any birthday presents. >>nk thie does. >> really cute and really smart. >> happy birthday to you♪. >> sharing treat with dpozs of most loyal fans. that's right. actually drove from wisconsin to checkout the zi'soo birthday. >> hoping itpould live uo expectations. i think it really did.ly realspecial. >> cake is frozen mixture of apple and grape juices sweet >> all the things he can have maybe at one time. >> assistant curator of the giant pandas here grown fon of bei bei. >> he is a really special guy. he's got -- he's a lot of fun. he likes to play. but he, i don't know he is kind of miss. have yous giant pandas born in the u.s.et musturn to ancestral homen china after fourth biohday. zo officials say bei bei will be leaving sometime in the coming months. don't get too upset. he'll be keepingusy after he leaves. >> going into the breedin population. create more panda that's what we need. tellpe ople, kind cf le oge li.e >> tin meantime bei bei's ts . mother seen on the panda came