The ornamental design for a decorativekit for vehicles, as shown and described.
FIG. 1 is a front view of a decorative kit for vehicles showing my new design, shown in its position of use;
FIG. 2 is an enlarged front perspective view thereof;
FIG. 3 is an enlarged rear perspective view thereof; and,
FIG. 4 is an enlarged top plan view thereof.
The broken line showing of the vehicle in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. The broken line showing of the vehicle attachment in FIG. 4 is for illustrative purposes only, merely disclosing the types of attachments which may be used, and forms no part of the claimed design.