Easter Yard Signs Decorations - Coroplast Baskets Eggs Bunny Easter Lawn Decorations, Easter Egg Cutouts, Easter Props Yard Sign with Stakes. Economical and durable, our Coroplast Yard Signs are a staple of outdoor advertising. These Happy Easter Outdoor Decorations full-color direct printed graphics are vertically fluted for use with a D Wire. Coroplast is typically used for yard, parking, real estate, and election signs. They are waterproof.