The ornamental design for a babybag, as shown and described.
FIG. 1 is a top, front perspective view of the baby bag in an unfolded, open condition with a shoulder strap attached thereto, showing the new design, the rear perspective view being a reverse mirror image thereof;
FIG. 2 is a top perspective view of the baby bag of FIG. 1, in a partially folded condition with the shoulder strap partially detached therefrom; and,
FIG. 3 is a bottom perspective view of the baby bag of FIG. 1, in a partially folded condition with the shoulder strap partially detached therefrom.