CitiBlocs 500-Piece Wooden Building Blocks Each block is precision-cut from sustainably harvested high-quality New Zealand Radiata Pine grown in certified renewable forests Because the blocks are made from top-quality wood, no additional glue, snaps or connectors are needed to keep the blocks together Citiblocs are safe natural and green Dr. Toy Best Green Product 2009 Finally, all CitiBlocs sets are packaged responsibly in Vietnam, using minimal resources, and are CPSIA and ASTM certified