Gifts for young kids who are really into airplanes?

I've got a nephew who is 3-something years old. He's really into airplanes. All of the ideas of gifts I've found have either been books (I give him books, but I'd like to give him something interactive) or toys that are way above his age level.

Does anyone have a recommendation for a good gift for a 3 to 4-year-old who loves airplanes?

Edit: I just want to give a big thanks to all of you for being so helpful. I've got some great ideas for Christmas, his birthday, and beyond if he remains fascinated by planes. Very helpful.