A 7th Birthday Party Cardboard Box Style! My littlest loves cardboard so we find ways to create with it. However, when she announced that she would like her 7th Birthday theme to be cardboard boxes...I admit that I tried to sway her in a different direction. All in all her vision and theme came to life with cardboard food, a cardboard village, even a clothesline hanging with cardboard undies! So much fun creating this one!