There's "Salon Madam - Suntik Botok", an episode about age treatment goes to far, currently on youtube:https://www.youtube.com/watch?v=kMtQeKF1qrQ
And then there is a brand new episode of German kids show Siebenstein with the name "Siebenstein plÃ¶tzlich 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)