Apart from water, the solar powered backpack charger is one accessory your don't want to be without when venturing into the wild. This compact and lightweight charger easily fits in any bag and provides enough juice to charge up to four different electronic devices.
Use over sized tractor seat, smaller set of wheels on axle and medium sized wagon wheels back. Gear for steering wheel if cant find old one from tractor. Don't like cement on front, maybe old trough or feeder.