When Liza and Jeremy run to their mother during a scary storm, she comforts them by telling them about the Invisible String, which connects people who love each other no matter where they are and means that they are never alone.
Lily's mother is sick and her father must go to work, but she does not want to stay with a babysitter, even if it means playing with cute baby Sam, sweet little dog Ringo, and fun big brother Jack.
"When Stanley's Mom has to go away for work, Stanley decides to take off, too--all the way to Mars. Can the Martian who takes his place on Earth get by in Stanley's family even in Mom's absence?"--