Modelism
Modelism is reduced-scale reproductions of means of transportation, which you can operate by remote control (for example reduced-scale cars, boats, planes...)
On these web pages, you can know when there are car races in the world in different car categories, you can buy cars on different scales (1/43, 1/24)
http://www.teamtrinity.com
On these web pages (in English and in French) , you can contact people who have got reduced-scale cars to be given advices (if you have a problem) and there are hundreds of contacts about where to buy. A lot of prices are shown.http://www.mafma.com