Edgar and Ellen live in a 13-story mansion on the edge of Nod's Limbs. Ellen is supposedly the older of the twins by 2 minutes and 13 seconds. They live with a hairy creature who they refer to as Pet — a hairball with an eyeball. Their groundskeeper and caretaker, Heimertz, lives in a small shack just outside the house. Their mansion is located near a now disassembled junkyard, which the twins had lovingly dubbed their "Gadget Graveyard". They take parts from it and create marvelous contraptions for trouble.