Grover's Grandpa appears in the 1987 Sesame Street book Wait for Me! When Grover takes off to go biking with Ernie, Bert and Big Bird, he leaves Elmo behind who has already suffered some feelings of inadequacy for not being big enough to do certain "big kid" things. Since Grover was too busy to stick around, Grandpa takes Elmo to the zoo. Because he's not so young, Grandpa moves at a pace that Elmo can keep up with, noting that those who are always in a rush, often miss things.