Neighbor of mine let my 5 yr old son ride a little bitty ATV and now he wants one so bad he is actually helping with housework to earn money so he can "buy" one. I know absolutely nothing about them and need some guidiance. It appears to me that the smallest one a person can buy is 50cc's. I am sure that would be sufficient for his riding ability, although I wonder how long that would be the case. He is about 46 pounds and the farm we live on is mostly flat (2 creeks but he can't get near them due to fences). Our field has underground springs and can get really soupy after a rain so he will need a little torque to keep the atv from getting stuck. So does anyone have any suggestions? I have heard the big manufacturing names (honda, yamaha, kawasaki, Can-Am, Polaris, etc). However I am torn in buying a name brand (and name $$$) for one that he will outgrow. I see alot of brands I have never heard of (and suspect they are chinese made) at places like Pep Boys and Northern Hydraulic and was wondering if any of those would be worth the risk in buying? (If so which ones, if not then what does the group suggest?) Thanks in advance for any suggestions.