The ornamental design for a formalchildren's stationery, as shown and described.
FIG. 1 is a front perspective view of a formal children's stationery;
FIG. 2 is a front elevation view of FIG. 1;
FIG. 3 is a rear elevation view of FIG. 1;
FIG. 4 is a left side elevation view of FIG. 1, the right side elevation view being an identical image thereof;
FIG. 5 is a top plan view of FIG. 1, the bottom plan view being an identical image thereof; and,
FIG. 6 is a perspective view of FIG. 1, in a folded condition.
The broken dashed lines depicting a child at a desk and a cursive ‘Thank you’ in FIGS. 3 and 6 are portions of the formal children's stationery that forms no part of the claimed design, while the remaining broken dashed lines shown in the drawings form a part of the claimed design.
The broken dotted lines shown in the drawings form a part of the claimed design.