Provided may be a wind propelled rolling vehicle with a self-adjusting
sail that may be substantially formed in a relatively small, single sheet
of material, or assembled onto a standard chassis. The exemplary
embodiments may utilize bushings to spread dynamic loads so as to allow
the use of very light structural material such as thin sheet foam thereby
forming a safe, low-mass toy vehicle capable of achieving good
acceleration and rolling speed relative to a given wind force, and
configurable into many themes.