Unique Industries Build a better party space for your child s celebration with this Building Blocks Banner. Our building-blocks-themed party supplies feature a fun assortment of colored bricks and can be used to construct any boy or girl s building blocks birthday party. This six-foot-long party banner is a great way to put the finishing touches on your party and the strings affixed to both ends will make hanging it up easy indoors or out. Fasten it across a doorway or on a wall. Make sure to look for our other matching Building Blocks party supplies for more fun birthday party ideas.