circus model building. enthusiasts even start their own >> the circus model builders association of america. >> with five members oh, more than that. several hundred. >> really? including joe himself. yes, the circus model builders association of america still meets today. >> there's miniature circuses that are around the country. >> there are? >> there are. there's a group of folks that -- actually, that's their love. they build miniatures of the circus. >> it's that same love that drives william dickey to create his own miniature big top. his grandson, clayton dickey, says it all starts with a pocketknife. a pocketknife? >> yes, ma'am. >> he never used a jigsaw. he never used a lathe or any kind of turning tools. it was always a pocketknife. >> boy, this knife has some mileage on it. william takes that pocketknife and puts it to a block of wood. did he see a drawing of something? did he have a blueprint? >> well, my dad always said that his dad always said was, "you carve away everything that's not >> and you're left with a horse? >> and then you're left with a horse. >> if only it's that simple. >> it took hi