Buster: Hey, look. (He picks up a starfish.) We should call it the Starfish Enterprise.
D.W.: Enterprise. I can't even say that word.
Arthur: You just said it.
The three debate calling their sandcastle the Starfish Enterprise before finally deciding to call it Castle Starfish. They reference the Starship Enterprise, the name given to the vessel featured in the television classic Star Trek and later in Star Trek: The Next Generation (which featured the Enterprise NCC 1701-D.)