There's "Salon Madam - Suntik Botok", an episode about age treatment goes to far, currently on youtube:
https://www.youtube.com/watch?v=kMtQeKF1qrQAnd then there is a brand new episode of German kids show Siebenstein with the name "Siebenstein plötzlich klein" online.
When a youth potion is accidentally dropped in Siebensteins bathtub, she turns into child. ...but don't expect any special effects from that low budget show.
https://www.zdf.de/kinder/siebenstein/siebenstein-ploetzlich-klein-100.html(_link_ untested, you may need a german proxy)
