When Craig says that Manny reminds him of his five-year-old half-sister Angela, this is an inside joke as Cassie Steele (Manny) and Alexa Rose Steele (Angela) are sisters in real life.
Ellie is reading "The Gashlycrumb Tinies" by Edward Gorey. Marco is also a fan of the book. His favourite letter is "E": "E is for Ernest who choked on a peach."