I'm kinda thinkin about makin a 3 wheel center drive push trailer inside one of them plastic truck tool box ya get at wall mart bottom cut out of the box to hide it all in. My idea is to make a shaft to mount 2-26" thin tires on the outside and a nice wide 26" rear back tire in the middle for the drive...hopefully being wider will make the thing push straight. One obstacle is the trailer hitch I'd really like it to be ball type I have a 1.5" ball don't know where to get a receiver that size probably have to just make one. I'm not wanting to make this thing fast at all likely put a 50-60 tooth sprocket on it for a drive. I expect this idea will get shot down which is ok I'd rather know the futility LOL! BUT if it works you could easily mount a bench seat on top of it and haul little kids on it (buckled in again very slow speed)...do a light weight hot shot delivery maybe?