The ornamental design for a headband with a dinosaur, as shown and described.
FIG. 1 is a perspective view of a headband with a dinosaur in accordance with my design;
FIG. 2 is a front elevational view of the headband with a dinosaur of FIG. 1:
FIG. 3 is a rear elevational view of the Headband with a dinosaur of FIG. 1;
FIG. 4 is a left side elevational view of the headband with a dinosaur of FIG. 1, a right side elevational view being a mirror image thereof;
FIG. 5 is a top plan view of the headband with a dinosaur s of FIG. 1;
FIG. 6 is a bottom plan view of the headband with a dinosaur of FIG. 1;
FIG. 7 is a side perspective view of the headband with a dinosaur of FIG. 1 having an upper portion and a lower portion thereof rotated with respect to one another;
FIG. 8 is a left side elevational view of the headband with a dinosaur of FIG. 7, a right side elevational view being a mirror image thereof;
FIG. 9 is a front elevational view of the headband a dinosaur of FIG. 7;
FIG. 10 is a rear elevational view of the headband with a dinosaur of FIG. 7;
FIG. 11 is a top plan view of the headband with a dinosaur of FIG. 7; and,
FIG. 12 is a bottom plan view of the headband with a dinosaur of FIG. 7.