PJ and Chelsea are going around the world in Dr. Drabble's Brilliant All-in-One Traveling Apparatus. When the doctor invents a duplicating machine, they decide it's a great way to "make" new friends in the Philippines. In the end, however, they see that the trouble they cause is hardly worth the effort they save.
This book is part of the Dr. Drabble, Genius Inventor Books series and is book #1 in the series.