A simulated concrete mixture combines aggregate, sand, mortar clay, and additive. The mixture is hydrated with enough water or a hydrating solution to create a simulated concrete material having a desired slump. Useful aggregates include any type of aggregate used as a base for concretes, and useful additives include soaps, detergents, surfactants, and flocculants. The material can be refreshed with water or a refresher solution. The hydrating solution and refreshing solution are solution of water and additive. The simulated concrete material can be manipulated until its consistency becomes unworkable, after which it can be refreshed with water or refresher solution.