Three Delivery Season 1 Episode 8 Happy Birthday to Sid

Kong Li adds a secret ingredient into the cake mix at the Yin Xing bakery which changes any adult who eats it into a child. Nana and Mr Wu serve this cake at Sid's birthday party and are instantly turned into 8 year olds. Kong Li tries to take advantage of the fact that Nana doesn't remember the kids and still thinks that she and Kong Li are friends.