The whole team has been questioning Bucky about a lot of boxes that have been delivered to the tower for him to take somewhere. Bucky won't devulge any imformation as to what's in the boxes and where does he take them. He's been questioning Bruce about children's infectious diseases. Then early one morning Bucky wakes up Steve and takes him to a coffee shop (not Starbucks) and a toy shop. The barista, the bus driver, and the elderly woman who opens up the doll store seem to know Bucky and are friendly and familier with him. Bucky and Steve take two large boxes to a children's hospital, where the staff and the children all know Bucky and are happy to see him. One box contains stuffed Bucky Bears and the other has plush dolls made to look like each sick child there, except for the new kids and plus three kids that died since his last visit. One of the sick girls has here older brother, Brady, there with her. He's the boy who recognized Steve at the Smithsonian when he was incognito in the movie.
I know this has to ring a bell with someone. Even jus the title or author will be a great help.