Bell ringing

[Vicky loves Chachi]

Chachi is 6 months, I can say with confidence that he is potty trained. He rings the bell every time he needs to go and has not had an accident for months. At first when he use to ring the bell constantly we would take him right out since he was learning. Well now he is ringing the bell for attention. Whenever we r all busy cooking dinner , doing homework etc and not giving him direct attention he starts to ring the bell over and over. We don't have a fenced in yard so we have to take him on leash to his fenced in pen. He doesn't always do anything and sometimes he squeezes out a little pee because we tell him to. We sometimes leave him in the pen for our sanity but he starts to bark wanting to come in and a few minutes later he rings again. He does not have UTI. He only does this when he's bored. We give him lots of love and attention but sometimes we r busy and he needs to play on his own. My husband works from home some days and he would love to have Chachi out of his crate sitting next to him in his office but Chachi constantly rings the bell so in the crate he goes.
What can I do to reduce this behavior?

[Rosemary (Ro) and Enzo]

I've basically done the same. If I think she is ringing them for play and absolutely sure she has just been out, then I take then down for a few minutes. It appears, she then loses interest or forgets about them. But I'm definitely not taking them down for good. It works too well at the crucial times!