Two-kick whistle + tail wings (double-bang firecracker)

Equip the firecracker with an exceptionally loud whistle and a large tail fin, transforming it into a sky-bound projectile. The whistle, lacking support, may have a slightly obstructed opening; use an art knife to clear it for enhanced sound. Test the launch posture; ideal ascension maintains vertical orientation. The sound may not be as loud as anticipated, potentially due to high speed and altitude. Consider printing 10 layers initially for size comparison, then scale appropriately before a full print. The protruding fuse might hinder insertion; create a groove below the fuse using an art knife to accommodate it before installation.