This is a building block set made by a Chinese company called "Century Youyi Toys Co", and they"re sold under the brand name "Sluban" The brand is named after a famous Chinese inventor Lu Ban. These sets are very popular in Europe and Asia, but are not as well known in the USA. These building blocks comply with the strict toy safety standards of both North American & European (EEC) regulations and have passed and obtained the toys certificate for China Compulsory Certification (CCC). Century Youyi Toys is an ISO 9001 certified company. You can rest assured that this toy is safe, and meets the applicable safety standards. These blocks are NOT Legos and do not have any affiliation with them. In general the blocks are compatible and interchangeable, however with all the variation in both types of blocks, complete compatibility is not guaranteed. These sets contain small parts and should not be played with by children under 6. The writing on the box is mostly in Chinese, however the assembly instructions consist of pictures and numbers, so there is no language barrier The figures are fully posable, there"s a compartment for one in the tractor driver seat. The trailer consists of two containers which contain doors and can be opened to put stuff in during play. They can be mounted on the trailer with only a few fasteners so they"re easy to remove during play, or the design can be easily modified to make the containers firmly attached.