The ornamental design for a hand-crank dyno-powered generator for toy vehicles, and shown and described.
FIG. 1 is a perspective view of a hand-crank dyno-powered generator for toy vehicles, illustrating my new design;
FIG. 2 is a front elevational view of the invention;
FIG. 3 is a rear elevational view of the invention, illustrating a toy vehicle in phantom outline, the broken lines showing the toy vehicle for illustrative purposes only and forming no part of the claimed design;
FIG. 4 is a left-side elevational view of the invention;
FIG. 5 is a right-side elevational view of the invention;
FIG. 6 is a rear elevational view of the invention;