I manufacture and sell cool pull-ups bars [1] for fitness ethusiasts and all others, who want to have an allrounder at home for their fitness workouts.

Does not make me rich, but provides in addition work and income for three people doing it also as a side-job. Main problem: the product does not brake and it's a true craft business, so 95% of all customer buy only once.

[1] https://klimmzugstangen.de/