When your 4 year old comes to you and says, "Mama, I want to make a dress for myself out of paper," here's what you do:
(1) suppress your desire to respond, "Honey, I don't think paper is going to be able to make a dress. Is there something else you'd like to make?" [and trust me, it took all my strength to fight back those words, being the practical person I was/am]
(2) stand back and marvel at the incredible creativity that can be released from a child with the desire, encouragement and raw materials supportive of that creativity.