Kids even in grade school should be past “Cat in the Hat” and “One Fish, Two Fish, Red Fish, Blue Fish” and “Green Eggs and Ham”. I would fault whoever recommended these books for Mrs. Trump to give. And I would also agree with the librarian that a better job should have been done selecting schools who were in the most need of books for their students.
I did a quick web search and the Cambridgeport Elementary School, like most grade schools, includes kindergarten. Their school library catalog is online and I found Dr. Seuss books already on the shelves there.
Those books are fun and not below the level of many elementary students to read on their own.