I am trying a pomodore method for myself and my son. Although I am not sure 25 minutes is ideal. I find the logic of, 'I can do almost anything for 25 minutes

I am trying a pomodore method for myself and my son. Although I am not sure 25 minutes is ideal. I find the logic of, 'I can do almost anything for 25 minutes' appealing, because you know you wont have to do it again, today. I recently picked up a nice friendly clock for this: https://www.amazon.com/KeeQii-Minute-Visual-Silence-Countdown/dp/B07YFMT92M/ref=pd_ybh_a_4?_encoding=UTF8&psc=1&refRID=S4T18J83TTP5K4Y23NTD https://www.amazon.com/KeeQii-Minute-Visual-Silence-Countdow... I liked this as it was easy to see how much time there was. I avoided the red one as I found the blue to be more peaceful. So I have one at home, will buy another one for work.