Perfect for a summer wedding, pinwheels are equal parts whimsical and fun.  A great DIY idea (see a tutorial from Style Me Pretty here, one from Once Wed here, and one from Better Homes and Gardens here, you can make them for all of your guests as favors or place cards, or just for you and your wedding party.  Also fun decor for a birthday party or a baby shower…

Top Row:  Alyssa Alig Photography, green pinwheels via Brides, pink ones in pitcher from Better Homes and Gardens
Middle Row:  Via Green Wedding Shoes, pinwheels in garden via Hatch Creative Studio
Bottom Row:  First and last photo via The Sweetest Occasion, photos 2 & 3 via Snippet and Ink