Building this object requires 6 materials -- 1 Pumpkin Balloon, 2 Papers and 3 Souls. You must send send a request for each material to a friend directly. You accept the materials in Facebook. Once you have enough of these items, you need to click the build button to receive your invitation. When this item is completed, just place it in a room in your house. Your pet will be visited by up to three friends who will walk slowly with their arms outstretched. Your pet cannot wash or interact with them. It is recommended to sell your invitation right before it expires so you can get the cash.