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The ornamental design for a portable play surface device, as shown and described. |
FIG. 1 is a view in perspective of a portable play surface device showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front plant view thereof;
FIG. 4 is a side plan view thereof;
FIG. 5 is a back plan view thereof; and
FIG. 6 is a bottom plan view thereof.
The broken lines suggesting toy blocks shown in FIGS. 1 and 2 are for purposes of illustration only.
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