Wrap these plastic wrap and store in the refrigerator until ready to serve. The whipped cream is stabilized so will hold up well when sitting out but you want to keep them as cold as possible until serving them. I wouldn’t recommend making them more than a day in advance because strawberries tend to sweat and get mushy once they are cut but if you do make them ahead of time, I would wait to put on the chocolate eyes and sprinkle nose before serving if possible.