Age:7+ years
To play outside.
Keep persons or objects 9 feet from area around pilot.
Start slowly, go faster, when whirling plane around pilot, until trail of bubbles occurs. Careful : turning at too high speed will tear off the bubble trail.
Centrifugal power keeps liquid in reservoir during flight. Skilled pilots whirl bubbles without spilling liquid!
Smooth speed reduction and shorter gripping of string will prepare landing. Good pilots will clean the plane with water after the flight.

Exclusive: the video of Pustefix bubbles! Click here