The present invention relates to a teaching aid for an art class, and more specifically, to a teaching aid for an art class which has protrusions protruding in a lattice form on a wide container for storing water. When compressed sponge is inserted between the protrusions when the container is filled with water to form a predetermined pattern, users can observe the swelling compressed sponge and experience a three-dimensional effect and can spark creativity. The teaching aid for an art class comprises the following: a container in which a plurality of protrusions are protruding in a lattice form on the surface, and a predetermined space is formed inside the container to form a water storing space; a lid combined to the upper side of the container; and compressed sponge fitted between the protrusions and expanding when touching water.;COPYRIGHT KIPO 2017
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