They have 21 hours total to make their structure. When they're finished, anything that's not sand or water must be removed.
This was the winning sand sculpture. It's called, "It ain't no yolk". The sculptor is from Groveland, MA.
After everyone is done their sculpture, it is sprayed with a mixture of water and white glue to protect it from the elements.
Some of the sculptures are created by merchants in the area to promote their businesses. After about 2 weeks, the sculptures are bulldozed because 10 tons of sand falling on someone could be dangerous.