Clark loves to look at screens. It's kind of like in the movie "UP" when the dogs say "squirrel!". Clark doesn't care if it is a computer, TV, or phone he just wants to stare at it. If you can distract him to look away from the screen its just for a second before he is drawn back in. In the picture above he is watching Jeff play "Angry Birds". Notice how intently he is staring at Jeff's phone.