The Wooden Toy Co half-circle building platforms increases so many play opportunities! Add them to blocks or play rainbows to increase the play and keep your child entertained. These wooden toys for kids are made from certified, sustainably grown 9mm radiata pine plywood. They have a fantastic natural colour and feel. Suits most sizes of rainbow. All of our toys are made in Melbourne, Australia. Dimensions: Diameter 380mm Diameter 355mm Diameter 325mm Diameter 295mm Diameter 265mm Diameter 235mm Diameter 210mm Diameter 180mm Diameter 153mm Diameter 127mm Please note that building platform holder sold separately.