The ornamental design for a kiteflyingdevice, as shown and described.
FIG. 1 is a perspective view of a kite flying device showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is bottom plan view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a rear elevation view thereof; and,
FIG. 7 is a front elevation view thereof.
The broken line shown in the figures are included for the purpose of illustrating portions of the kite flying device and form no part of the claimed design.