Abstract: An activity toy which may be used to first form a toy monster figure by shaping a plastic molding material mixed with sodium bicarbonate powder around a toy skeleton, and to then dissolve or break the molding material free from the toy skeleton by immersing the monster figure in a diluted citric acid solution contained in a vat. The toy skeleton is made out of a number of parts removably held together by ball-and-socket joints. Measuring receptacles are provided for determining the amount of plastic molding material needed for forming the toy monster figure. Stamps may be used to form the face or other part of the toy monster figure, or to add texture or detail to the molding material.

Abstract: A display device such as a model of a blimp has an aperture formed on one side thereof for display of information carried on a screen within the blimp. Means are provided to rotate the screen and to illuminate the screen interior so as to sequentially display the information through the aperture.