So no pictures yet as it's all in my head... completed already, of course

Anyhow, the observation balloon will be known as the Schfuba, which stands for Schwein Furz Balloon.
The halfmen Master Engineer have noticed that pig fart is lighter than air gas and thus it can be used to lift/levitate the observation balloons used by the Halfmen army.
For this small observation balloon I plan to use balsa, wire, plasticard, cord and PVA glue soaked bandages. As is this a small balloon, there will not be any pigs included. But maybe in near future I will make a long distance model with Schfu producing pig(s) aboard
