Balloon Dragons are so named because they are filled with a gas that makes them almost lighter than air, similar to balloons. However, they are not prone to bursting, as they are covered in tough skin and can deflate themselves if necessary. In addition, they generally are slow moving. They use their gas bladders to float to the tops of trees, where food is more abundant. They can shift their weight from their backs to their fronts, allowing them to reach leaves and fruit.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

It's a good thing the cave is very large. When Bounce, Boing, Bubbles, and Giggles are all bouncing around the interior, the air seems very full of dragon. Bounce, like Giggles sometimes puts off eating until the hatchlings are all asleep in order to not miss any of the fun. Bounce is a very light-hearted, young at heart dragon, with no intention of ever 'growing up.'