Patent ID: 7255626

Claim:
A tutorial toy car comprising: a shell body containing a left motor and a right motor, a motor shaft extending from the left motor to a left side of the shell body, and a motor shaft extending from the right motor to a right side of the shell body, a driving wheel being fixed on each of the motor shafts and a central shaft being fixed under each of the driving wheels with each central shaft having a central shaft differential wheel meshed with the driving wheel adjacent the central differential wheel, a central smaller wheel being provided on each of the central shaft differential wheels, the central smaller wheels meshing with a bottom differential wheel, the bottom differential wheel being on a bottom shaft fixed under the central shaft, a front side shaft being fixed in front of each of the central shafts, and a rear side shaft fixed behind each of the central shafts, a gearing differential wheel being provided on each of the front side shafts and the rear side shafts and being engaged with one of the bottom differential wheels, a center of each gearing differential wheel having a small wheel which meshes with one of terminal gearing differential wheel, a front wheel shaft being provided in front of and under the front side shaft, and a rear wheel shaft being provided behind and under the rear side shaft, each of the front wheel shafts and the rear wheel shafts have one of the terminal gearing differential wheels thereon; a transparent gear case on each side of the shell body, the transparent gear case containing the motor shaft, central shaft, bottom shaft, front side shaft, rear side shaft, driving wheel, central differential wheel, bottom differential wheel, gearing differential wheel and terminal gearing differential wheel which are visible through the transparent gear case; and a wheel operatively connected to each of the terminal gearing differential wheels for propelling the toy car.