In the 1960s MOMA commissioned artists to create some new toys for the museum's shop. Modernist Betty Thomson, a toy designer, designed this modern cube toy sculpture she called Multiplications. It's a beautiful item and I would refer to it as a sculpture and not a toy. It is made of acrylic cubes hinged together with mylar. They could be arranged in an array of stacked, or flat, configurations. It measures 2 1/4" square, comes with the original box and is incised with Betty Thomson's name and the date 1968 on one of the 8 original parts.
Very good vintage condition, the box showing wear but is intact.