I am making a 12 in square baby shower cake with butterflies on the side and a large butterfly on the top corner. The wings are bent up like they are flying and I wanted to know what would be a good way to attach them to the fondant without them breaking or falling over.

Royal icing or candy melts

Candy Melts are a life saver lol.... I did a giraffe in fondant and her legs snapped off... I asked here and was advised to try candy melts... I did... and that stuff was super good.... dried quickly and held super good.... now that's my "new glue" hehehehe