My 6-year old son has become a wizard on digital devices. Give him an iPhone, iPad or iMac, and he’s right at home. Of course, I’m not a big fan of Wi-Fi, so I make sure that he keeps any mobile device on airplane mode as much as possible.

I’m also not a fan of the posture-destroying, sedentary aspect of these things. I mean, if unchecked, he could stay on them for hours, so I came up with a rule: Every 30 minutes that he uses a digital device, he must do 10 reps each of squats, push-ups and leg raises.

That’s a total of 30 reps every 30 minutes, and guess what? He’s been doing it! He goes to the timer on the stove, enters 30 minutes, and once it beeps he does his reps.

Try the same rule with your kids. If they’re not outside anymore playing street hockey, let’s get them moving inside the house at least!