The ornamental design for the folding scooter, as shown and described.
FIG. 1 is a perspective view of a foldable scooter showing my new design;
FIG. 2 is a left side elevational view thereof in a folded position, the
side opposite being a mirror image;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof with the handle in a
shortened position, the broken line showing of the child is for
illustrative purposes only and forms no part of the claimed design; and,
FIG. 5 is a left side elevational view thereof, the broken line showing of
the women is for illustrative purposes only and forms no part of the
claimed design.