Church youth groups.

Yes, really. You need to get kids out there with other kids, and in environments where they aren't fighting in the bathroom for views on Instagram or planning to cut their dicks or tits off for social proof. It doesn't matter if you believe in what the church reaches, you have to put your kids in a healthy environment where they can socialize with other kids.

Other considerations are, can they mentally stimulate themselves without getting off the couch? If so, put a stop to it. Your kid is better off playing with sticks. That shit is candy, devoid of substance but maximally stimulating. You're training them to look for the easiest possible way to entertain their minds. You're training them to stimulate without learning or doing. You're turning them into obese consumers. Stop doing that.