Scentsy Buddy Halla the Hippo Your Buddy is ready to play as soon as it arrives! Simply open the zippered pouch in your Buddys back, insert a Scent Pak, and zip the pouch back up. You can change Scent Paks at any time. For the best experience when changing between Scent Paks, remove the current Scent Pak, wait a day or two for its fragrance to dissipate from your Buddy, and then insert a new Scent Pak.