Can you take a walkman radio with headphones on the plane.?

Forget the radio on an airplane for many reasons and get him a CD player with a headset. Make the change gradually and I believe he will like the change. You also can get him listening to books on CD if he likes stories. Do you ever read to him? You can also make your own CD's with a combination of stories and music. Start out trying to get him to just try it first and he may prefer recorded music because it cuts out all of the advertising he gets on the radio. Good luck.