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.
Yes, you can purchase an engine for an RC plane in a model toy store. You can also purchase such an item online at www.Amazon.com or www.Hobbylobby.com.
RC aeroplanes can be purchased from specialist model plane stores. An example of a specialist model plane store with stock of these is Elite Models in the UK.
One can purchase a model plane from the following sources: Play, Kings Lynn Model Shop, Amazon, Airplane Shop, Easy RC, Red Flag Deals, Airfield Models, to name a few.
First you have to purchase a model. You can find one on this website. http://www.nitroplanes.com/ Then, you have to follow the directions that come with the plane you purchased.
There are many different types of RC airplanes that are available for purchase. The cost of one varies depending on what type you want and the size of it.
You can purchase an electric RC plane online from retailers such as Amazon. Once on the page, type "Electric RC plane" into the search field at the top of the page and press enter to bring up the planes.
RC boat kits are available for purchase online. You can also purchase RC boat kits in PM Hobbycraft Ltd in Regina, Saskatchewan. It is Canadas largest hobby store.
The number of pieces for an RC Plane Engine vary on the model of the plane. Here's a link that you may find helpful: http://www.rcairplaneswarehouse.com/
Due to the small parts used to make an RC model plane, it is not recommended for use by a toddler as they can easily choke on them. Also, RC model planes are not all that durable. A hard crash is enough to break the plane AND your wallet.
An RC plane kit is generally made of balsa wood, but the parts are laser-cut and mostly ready to assemble with the exception of some sanding. Motor, wheels, and remote are also typically included and detailed instructions for assembly are included.
A mini RC plane can cost as little as $30 to over $1000. The price depends on the level of detail you desire, scale, if you wish to build from a model kit, and the material of the plane. Foam planes with simple stickers are on the lower end of the price spectrum, while highly detailed larger scale models are more expensive.
The best place I have found to purchase an RC boat kit, would be offshorelectrics.com. This website provided a vast array of different price points of RC boats, and different models and styles as well.