Natural Spaces Hollow Blocks - Set of 34The Natural Spaces Hollow Blocks set is a versatile and engaging construction resource designed to support early learning, creativity, and problem solving. With a lightweight plywood design, these large, open ended blocks allow children to build complex structures while exploring concepts of balance, stability, and spatial awareness. This 34 piece set includes a variety of shapes, such as rectangles, cylinders, arches, trapezoids, triangles, and half