Learn basic shapes with these transparent, plastic attribute blocks and encourage the development of language skills. Encourage game play by handing students a piece and asking yes/no questions or design as many patterns as possible using only 1 color. Transparent Attribute Blocks are ideal for use on a light panel to explore attributes and color mixing. Circles have a diameter of 2.4" and 1.4". Each set includes 60 transparent, plastic geometric shapes, conveniently packaged in a storage jar with lid and carry handle.