A thermally erasable bath toy for enabling a user to create and erase drawing figures in a wet environment. The bath toy includes a drawing desk with a drawing surface that incorporates thermochromic material. A user can draw on the drawing surface by inducing the thermochromic material to enter its active temperature range, and the user can erase the drawing surface by inducing the thermochromic material to leave its active temperature range. The drawing desk can be caused to float atop a volume of water by incorporating or being formed of buoyant material or by housing an open inner volume. The color change in the thermochromic material can be induced by a temperature-operated drawing implement with a temperature applicator of heat transmissible material. The temperature applicator can include an elongate shaft that will act as a skeleton for a volume of insulative material. A weight at a proximal end of the shaft can help maintain a given temperature condition and cause a drawing tip to point out of a volume of water. Heat transmissible material can be retained in an open inner volume of the drawing implement. The heat transmissible material can be sealed within the drawing implement, retained within a removable hollow sheath, or inserted and evacuated through an opening in the open inner volume.