Good day to all!
Has anyone had any experience with indoor pools in and around Altstetten/Hardbrucke/Schlieren?
We're looking for swimming classes for a 12-year old boy (ideally 2 time x week, after school, he knows how to swim already

).
So far I found Hallenbad Sauna Alstetten, but have a hard time figuring out how the scheduling there works.
Any help is appreciated!
Cheers,
Femme