. >> reporter: the daily commute for calvin seaver is a long one.n hour from his manhattan hone to long island's rockaway beach. so this is your office. >> this is my office. >> reporter: not bad. with homemade tools, water, imagination, and considerable skill, seaver turns one of the most common things in the world into structures that are anything but. i can't think of another art form that's more impermanent. >> even if it falls, it can last now right behind us. >> reporter: you're okay with that? >> you got to be. >> reporter: the 59-year-old artist has been creating sand castles since he with was a small boy. he almost chose a career in architecture until he had a sudden realization. >> i don't care so much about what's inside this thing. i like the outside as an object. >> you need an entrance. >> reporter: so too do the children who gather around as he works. >> are you going to round off the edges? >> i've had some wonderful encounters with people. and that's definitely nice. but if they weren't here, i would still be here doing this. >> rep

the daily commute for calvin seaver is a long one.beach. >> so this is my office. >> not bad. and imagination, and considerable skill. he turns one of the most common things in the world into but. >> i can't thing of another art art form more impermanent. collapse now behind us. >> you are okay with that? >> the artist has been creating sand castles since he was a small boy.e a reer in architecture, until he had a sudden realization. >> i don't really care so much about what is inside this thing. i like the outside as an object. >> so too do the children who gather around as he works. edges? >> i had wonderful encounters with people. that's definitely nice. they wed still be here during this. >> reporter: art for art's sake. siebert earns his living as artist assistance will sell a picture here and there. money has never been his motivation. >> i want to do something, all the time. be creative t if nobody knew i would be building a sand castle. summer or winter, he is a constant presence on rockaway beach. his creation maze disappear,

the daily commute for calvin seaver is a long one.ver an hour from his manhattan home to long island's rockaway beach. >> so this is your office? >> this is my office. >> not bad. >> with home made tools, water, and imagination, and considerable skill. he turns one of the most common things in the world into structures that are anything but. >> i can't thing of another art foreign minister th art form more impermanent. >> even if it falls it could collapse now behind us. >> you are okay with that? >> you got to be. >> the artist has been creating sand castles since he was a small boy. he almost chose a career in architecture, until he had a sudden realization. >> i don't really care so much about what is inside this thing. i like the outside as an object. >> you need an entrance. > so too do the children who gather around as he works. >> are you going to round the edges? >> i had wonderful encounters with people. that's definitely nice. but if they weren't here i would still be here during this. >> reporter: art for art's sake. sieber