How do we get your kids interested in model airplanes?
Easy!
Load up every TV, VCR, Computer, Video game, Walkman, Ipod, Game boy, and every other mind numbing electronic device in your home, and take them to the second hand store! Use the money to buy a good set of Encyclopedias, and an assortment of creative tools for them to learn something worthwhile. Allow them free access to your model airplane magazines, and beginner "How to" model airplane books, several simple kits, and building supplies.
Rearrange their social schedule to include study time after school, and hour of play time, an hour of chores, and the rest to reading or personal creativity (model building allowed) at home. No friends over after the alloted play period, and no other unsupervised activities outside the home, other than library study, music lessons, and other worthwhile educational activities.
Weekends are for socializing on a reasonable schedule, and family activities and trips come first. Keep them busy every minute of the day, doing creative things, or developing their physical skills.
Now, with no TV or other distractions for yourself, spend time with your kids. Take them to the flying fields, and get them some stick time. Be prepared to assist them building and flying, as they will soon realize that it's better than staring at the wall, or being asked to do unscheduled chores around the house when they are not busy.
Be prepared to take you kids places on the weekends, because without the mall and video game parlors to waste their lives, they may want to do things with their parents and friends again!
Now, I know that isn't going to happen, even with my own granddaughters, but I'm thankful that my grandkids are being raised in a no nonsense manner. They are fully involved in Scouting, baseball, basketball, soccer, swimming, dancing, music, gymnastics, and the arts. They are taken to plays, operas, music recitals, circus shows, museums, zoos, and school activities, and allowed to attend those activities with the families who are raising their children similarly.
They may never get interested in model airplanes, but their interest will surely be in one or more of the creative activities they are allowed to enjoy with friends and family.
Wishful thinking 101: Parenting!

Bill