I would talk to a plumber and see if there is some sort of solenoid you could install on the pipes. I know Grainger sells them for industrial uses. But this may

I would talk to a plumber and see if there is some sort of solenoid you could install on the pipes. I know Grainger sells them for industrial uses. But this may run up against housing codes 12 different ways. shrug Do you have room outside for something like a splash pad or kid pool? Maybe if they're functional enough they can learn that the kid pool is for indulging their fascination but inside water is not?