Fairly easy but I would recommend you measure your man fully erect before this. Then you don’t have to worry about keeping hard forever. The powder gets solid faster than thought so going to have to reorder the molding powder and try again. It was still fun. And the label has the instructions on the back, u have to pull them out of the tube. I would recommend that once the powder is mixed put it on asap. Dont worry about the lumps like i did.