My Own Pet Animal Farm Party Walking Balloons Your pet comes with its own leash. Your pet is precisely weighted to stand on its own feet. Your pet is re-fillable. Each My Own Pet balloon is brought to life by inflating it with helium. Once inflated, it immediately becomes ready for adventures. These re-fillable toys feed the imagination of their owners for 1-2 weeks before needing another "shot" of helium. Then they are ready to play again.