What is important is balance. If a child spends an hour on the computer or watching TV, equal time should be given to playing with peers or engaging in individual activities like reading or crafts. It is important to involve the child in making these decisions and setting the parameters for how they spend their time. If we give children some ownership of the rules, they are usually more willing to follow them than when they are simply imposed from above. It is also important to appreciate individual differences. You will not be able to keep some children from playing sports, while others prefer more sedentary activities.