  Bubbles have always captivated our curiosity with their aesthetics and
complexities alike. While the act of blowing bubbles is familiar to everyone,
the underlying physics of these fleeting spheres often eludes reasoning. In
this letter, we discuss the dynamics of inflating a soap bubble using
controlled airflow through a film-coated nozzle. We assess and predict the rate
of inflation by varying the source pressure. Visualising the previously
unexplored internal flow reveals that air enters the bubble as a round jet,
emerging from the nozzle opening and impinges on the expanding concave bubble
interface to form a toroidal vortex. Several scaling laws of the associated
vortical flow spanning the entire bubble and the vortex core are reported. The
observed dynamics of this bubble-confined vortex ring formation indicate
universality in certain aspects when compared to the free laminar vortex rings.
