Guangdong Baoge Educational Material Sci-Tech Co., Ltd. Our company specialized in manufacturing all kinds of BUILDING BLOCKS TOYS in the past twenty years, we are one of the biggest building blocks manufacturers in Shantou City, even in China. The best quality and highest class of the products in the building blocks factories here. All the raw materials we using are ECO materials like ABS, and all our products has past the certificates like EN71, ASTM, 7P&HR4040, CADMIUM, CPSIA and REACH. All the molds were opening by ourselves by CNC machine, so the bricks fits very well and has very good touching feeling. All our blocks are same size and standard as common building blocks for small /medium /big sets and could match and compatible with Lego's. Further information of our company, please surfing our website: www.wangetoys.com.