Out on the edge of Pencil Point is a house with so many rooms in it, nobody knows how many rooms it has, or what, exactly, is in each room. Mark and Theresa's parents work for the "Owners of the House," who spend all of their time inventing. Mark and Theresa often accompany their parents to the house. They always bring the dog, Bungee, along with them. One day, they discovered the treasures of this house when Mark and Theresa accidentally released Bungee into the halls of the hidden rooms. The invention in one room allows the children to experience flying like animals and swimming like fish; another room is completely made of chocolate; and the last room they explore is full of turbo-charged playground equipment. Mark and Theresa had so much fun discovering the incredible inventions in the hidden rooms, the entire day had passed and it was time to go home. Who knows what wonders lie ahead of them the next time Mark and Theresa roam the halls of the house on Pencil Point?