My mini bagpipes are based on the Renaissance bagpipes, the Hümmelchen.
The idea behind the construction was to create a soft-sounding "cousin" to the big pipes such as the Shepherds pipes, the Musette Béchonnet and the Medieval pipes. The mini pipes can not be overblown, but in principal they have the same "half covered" fingering as their bigger prototypes and work perfectly as practice instruments.
The mini pipes are in two keys:
C/F och D/G