Summary

Made in TinkerCAD as an experiment, I colored the flower with an orange, green, and brown sharpie, molded the petals using hot water, and grabbed a couple random stamen pieces from a discarded florist kit we had lying around and stuck them in to the rough inside section.

From later testing, a hair dryer will also work - in either case one must be careful not to burn themselves, and realize that it may take some time to get just right since the plastic cools down very quickly and can no longer be molded unless heated up again.