In this sixth book of the Grampa Hal Series, Grampa brings three boxes with him and announces that this time, each one would open up their own taped-up box. This gets Davey into a very sticky mess, and the contents of the boxes cause Mama to threaten not to cook supper for Grampa.
Grampa takes Little Davey to a place where he has never been before and teaches him about noises in the night.
He tries to teach Davey how to mow Mama's grass, only to cause himself a lot more work as Davey rides along on Mama's push lawn mower.
Before Grampa leaves to return to his home after the weekend visit, he asks Davey a question that alarms both him and Mama. They become very concerned about Grampa's future plans.
Come on! Let's get on over to Maplewood Avenue for another exciting adventure with Grampa, Mama, and Little Davey Gibson.