The fear of balloons is called Globophobia. “Globos” is the Latin word for a spherical onject such as a balloon, globe, or ball. “Phobia” is a fear of something. My daughter has a Boston terrier named Brutus. Brutus is fascinated with round objects such as balloons and bubbles. So I would say that Brutus has Globophilia. “Philia” means love, so Globophilia would be a love of balloons.
I love balloons so I have Globophilia.