Hand a child a block and a paper square, and they will happily tell you which one they can stack, even if they have never heard the word “dimension.” This kindergarten 2D and 3D shapes worksheet puts names on that difference. It shows three shapes: a blue cube, a purple diamond and a yellow block with a slanted side. Beside each one sit two tags, two-dimensional and three-dimensional, and the child colors the right one. The cube and the block are drawn with shading and hidden edges, which is how a flat page shows something solid. The PDF holds two pages, the worksheet and its answer key.