FIG. 1 is a perspective view of our decorative balloon with viewing window;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a perspective view of another embodiment of our decorative balloon with viewing window;
FIG. 9 is a front view thereof;
FIG. 10 is a back view thereof;
FIG. 11 is a right side view thereof;
FIG. 12 is a left side view thereof;
FIG. 13 is a top view thereof;
FIG. 14 is a bottom view thereof;
FIG. 15 is a perspective view of another embodiment of our decorative balloon with viewing window;
FIG. 16 is a front view thereof;
FIG. 17 is a back view thereof;
FIG. 18 is a right side view thereof;
FIG. 19 is a left side view thereof;
FIG. 20 is a top view thereof;
FIG. 21 is a bottom view thereof;
FIG. 22 is a perspective view of another embodiment of our decorative balloon with viewing window;
FIG. 23 is a front view thereof;
FIG. 24 is a back view thereof;
FIG. 25 is a right side view thereof;
FIG. 26 is a left side view thereof;
FIG. 27 is a top view thereof;
FIG. 28 is a bottom view thereof;
FIG. 29 is a perspective view of another embodiment of our decorative balloon with viewing window;
FIG. 30 is a front view thereof;
FIG. 31 is a back view thereof;
FIG. 32 is a right side view thereof;
FIG. 33 is a left side view thereof;
FIG. 34 is a top view thereof;
FIG. 35 is a bottom view thereof;
FIG. 36 is a perspective view of another embodiment of our decorative balloon with viewing window;
FIG. 37 is a front view thereof;
FIG. 38 is a back view thereof;
FIG. 39 is a right side view thereof;
FIG. 40 is a left side view thereof;
FIG. 41 is a top view thereof;
FIG. 42 is a bottom view thereof;
FIG. 43 is a perspective view of another embodiment of our decorative balloon with viewing window;
FIG. 44 is a front view thereof;
FIG. 45 is a back view thereof;
FIG. 46 is a right side view thereof;
FIG. 47 is a left side view thereof;
FIG. 48 is a top view thereof;
FIG. 49 is a bottom view thereof;
FIG. 50 is a perspective view of another embodiment of our decorative balloon with viewing window;
FIG. 51 is a front view thereof;
FIG. 52 is a back view thereof;
FIG. 53 is a right side view thereof;
FIG. 54 is a left side view thereof;
FIG. 55 is a top view thereof; and,
FIG. 56 is a bottom view thereof.
The broken line portions of the disclosure are included for the purpose of illustrating environment and form no part of the claimed design.