I want to buy this electric train set for my daughters room and have it mounted up high out of reach.
First: What does "minimum curve size O-27" mean? Does it mean how tight a curve the train can make?
Second: How can/should I go about mounting the track to the wall? I've seen this in someone's house but I don't know the person to even ask.
The following link is for the train I want to get and where I saw "O-27".

http://www.hobbymasters.com/williamsoscalegg-1girlspinktrainset.aspx