why amusement bumper car rides is popular in every park?

spring season coming, the time for dating with parks also coming, walking in parks no matter large or small, almost all the parks has amusement bumper car rides http://www.parkamusementrides.com, and also the rides is working with passengers. why bumper car rides so popular in parks?
1.it is an interaction rides, between car and car, passengers and passengers, once work, the atmosphere is really happy and exciting. 
2.one or two players in a car, and can drive their car themselves, no much limitation; 
3.and also for the amusement bumper car rides http://www.parkamusementrides.com, car image is different, colors also beautiful, passengers can choose for their interests;
4.also for the bumper car rides owners, this is a small investment and large profits project. 
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