Side car

Maybe on double track?

I just recently purchased a mig welder and am anxious to start welding things.
I as of yet have no idea how to weld, so learning how to do that is step number one.
My long term goal is to make my own frame, but for practice I may make a side car to haul a baby goat in.

Dude, build it, and put Some kinda cheesy plate on it, like "Just Kiddin’ ", or “Got Goat Milk?”, or something along those lines.

There used to be sidecar racing in BMX. Might it be time to bring it back for mountain bikes?