Cocomelon Characters Yard Sign Cutouts, Cocomelon Theme Birthday Party Props, Cutouts, Standees, Yard Decor With Metal Stakes. Economical and durable, our Coroplast Yard Signs are a staple of outdoor advertising. These Cocomelon Characters Lawn Sign Decorations Yard Signs full color direct printed graphics are vertically fluted for use with a Stakes. Coroplast is typically used for yard, parking, real estate, and election signs. They are waterproof.