So I am doing a baby shower cake tomorrow morning, and a last minute addition was to add a bow to the front of the cake. I made a fondant bow finished it about 15 min ago, never done one before. Will it dry in time for my cake in the morning if I leave it sit out all day and night tonight or should I have plan B? I am using Wilton's fondant from a box since it's not going to be eaten really. Thanks.

Did you add any gumpaste or tylose to the fondant so that it can actually dry in a couple of hours/1 day. Sometimes fondant alone takes days to dry and it is much more susceptible to cracking/breaking.
Fedra