The Stacker, designed for children 6 months and up introduces 4 basic educational concepts. Shapes ? the shapes are a triangle, square, pentagon, hexagon, octagon, and circle Shape Names ? each of the shapes have the name of the shape engraved in the side Numbers ? each of the sides of the shape have a number engraved on the top ? triangle has 1-2-3, square 1-2-3-4 and so on. Patterning ? smallest to largest size The stacker also helps little ones work on their gross motor skills and provides wonderful tactile experiences. Made from locally, sustainably harvested, solid hardwood maple, each piece is sanded smooth with engraved details. The entire stack measures just shy of 5÷ tall (each piece is 3/4" thick) and the largest shape ? circle is 5 1/2" across. The dowel to hold the pieces is a hefty 1÷ thick. Care Instructions: Wash by wiping with warm soapy water. Do not soak wood products in water or put in dishwasher as they may dry unevenly, causing the wood to crack.