Connection of bathtub to shower

The mother! ...or nobody! ;)

Maybe, but don’t you think it will look too dark if there’s a wall in between?

Don't you have a ceiling light?

Even with artificial light, it still looks like a hole - if the children can really shower by themselves, you have to drill into them from the start to wipe off with the flap - purely a matter of discipline.

A wall would be too bulky and unnecessarily darken the space.

I like the idea of enlarging the shower and having a shelf for the bathtub.

I agree with @Lexmaul. It’s purely a matter of upbringing. Even smaller children can learn to use a squeegee.

Plastic as a shower wall also needs to be wiped off after showering, only it doesn’t stay as nice as glass over the years.

Hello.
my suggestion. A shower flush with the floor with a glass wall 130x90cm. The glass wall in the door entrance area foldable to the right after 30 or 40cm. This way you have a larger sense of space during the day.

Alternatively. Leave the size as drawn and place in between from Villeroy+Boch from the VIVA program a stool-like bathroom furniture open for storing towels etc.

Behind the door on the left what is that square?