Penn Plax is a name that stands for Quality Innovation and Integrity. In the Pet Industry for over 50 years. Experience a great line of Pet Products in all categories!. Penn-Plax is committed to creating and manufacturing innovative pet products for first-time pet owners and serious hobbyists alike. Tent-O-Fun. Category: Small Animal. Sub Category: Ferret/Rabbit Items. Cubes: 0.0005. Weight: 0.2300.