While visiting the London Tower, Nina really, really needs to pee. Nana helps her get there, whether it be gliding down or getting past the security system. Nina makes it to the "Golden Throne". The Queen makes a cameo.
Nina is at the library, when the story being read reminds her she really needs to go. Nana and her make it there, and then race back to hear the end of the story
Nina is the mermaid in the parade. Unfortunately, all the water on the parade float makes her admit she needs to go. Nana jumps around on stilts and rides an elephant to get her the toilet.
Nina and her family are participating in Aunt Gladys' wedding. All of the water fountains make Nina really, really, really need to pee. Even though Frank tries to get there to the bathroom, ultimately Nana has to help her get there.