In my experience, this is the most motivating reason. Take something they love and show them how they can get control over it and play around. Kids like to play. They will take literally anything they can play with and play with it.

These high minded ideas about economic utility are for later, when they start worrying about their adult lives. But in the meantime, playing around with the computer and the games and websites and phones and seeing what they can do with them is the best answer.