Planes is affectionately known in our house as Cars Airplanes. The moment Bro Bro monkey saw the first preview, he was hooked and immediately noticed the relationship to Cars. He announced we had to see 'Cars Airplanes'. He's almost 4 and is all about transportation. Our house is full of Cars, Thomas trains, and I'm pretty sure airplanes won't be far behind (as a former flight attendant who is still enthralled by the magic of flight, I'm good with this).
As if the Universe knew how much he wanted to see this movie, we almost had a problem getting seats when we went to see it, but his luck prevailed and we all got to enjoy Planes.