The Beach Blocks is one of the many monster drops that can be acquired in the Frontier. Viable methods of acquiring the Beach Blocks include the following:
As its description implies, it is a set of faded multi-colored plastic blocks bleached and worn out by the sun's rays. Other than that, not much can be said about its overall appearance.
The Beach Blocks does not have any apparent usages in-game, other than being sold to a selling vendor at a selling price of 2,900 gold.