| 摘要 |
<p>A toy vehicle assembly capable of controlled locomotion in response to variations in frictional resistance along a support surface and method is provided. The support surface is a relatively low frictional surface such as a flexible sheet of polyethylene. A subjectively determined higher frictional guide pattern can be placed on the surface such as by a wax marker. The toy vehicle has a pair of driving front wheels and a power rear wheel. The axis of rotation for each of the wheels are non-parallel to the other axes. A coefficient of friction of the power rear wheel is greater than that of the front control wheels. The driving power wheel can propel the vehicle while the front control wheels can respond to variations in the frictional resistance of the support surface to control the direction of the toy vehicle. The frictional path can be subjectively varied and is preferably made from a water soluble material that can be removed from the support surface.</p> |
