Individuals making and flying these plane should know what they are doing and how to be responsible. With that in mind, the recommended age is 16 to adult.
This webiste has reviews of model airplane kits. I do not know enough about them to make a suggestion. Hopefully this site helps. http://www.jitterbuzz.com/cleveland_kits.html
Die cast model kits are used to build model airplane cars. For more information visit http://www.modelcarhub.com/ because it's that simple. It's fun too.
There are many different skill levels for making model kits. The youngest recommended age is 8 years old. This comes with basic model kits, which does not need painting or gluing.
Model car kits can be purchased at all kinds of stores. There are special hobby shops that have the model car kits and many chain stores have the kits.
Check with model airplane news (magazine). If they are original, in good shape, and still in their original packaging, a model airplane collector may be interested. Plastic model kits didn't come out until 1946; after WWII. The big companies such as Revell, Monogram, Aurora didn't come out until about 1950. Balsa was king before plastic kits; so it would be a collectable item...depending upon condition...as stated above.
Various hobby stores may carry RC model airplane kits, but for a larger variety and price options http://www.nationalbalsa.com is a website where you can browse and find what you're looking for.
MotionModels has a huge selection of model kits, of all kinds and sizes. Airplane Superstore has low prices and a wide selection as well. There are other good sites as well. Try them.
You can get ARF RC airplanes in kits ready to build. Your airplane will come in many parts, and it may be a difficult task to put together. This website may help with its detailed instructions http://www.rc-airplanes-simplified.com/rc-model-airplanes.html.
I would suspect you can, I would try either EBay.com or Craigs List.com. Another thought is to go to a search site of your choice and type in purchase Old or Vintage RC Model Airplane Kits and see what sites come up for you and check them out. If no luck there maybe you can post an ad on something like CraigsList.com or other free ad posting Websites and see if you have any luck that way. I hopethis is helpful!
Micro RC airplane kits may be found on the site Microflight, or they may be located at Hobby Lobby, Ebay, Amazon, Thirty Thousand Feet, and Toys R us.
There are several places you can look. It does depend on how high of a quality of an RC airplane that you want. Check out this place. www.nitroplanes.com
You can find model car kits at Hamley's toy store. There is a Hamley's at the Dubai Mall in Dubai.