Children's game structure having two modular parts (1) and (2), of an arbitrary number which combine to form a number of ogival arches (5) (5a) (5b) (5c) and which are joined together in line one after the other simulating the rings of a centipede and configuring a tunnel fitted at both ends with flat, vertical parts (17) and (18) representing the centipede's head and tail, with openings (19) and (20) for the children to enter and exit the centipede. The game structure is applicable for children's games of the type that allow the children to crawl through the inside or on top of the outside of the tunnel and the structure is easy to assemble and disassemble for storage as it only requires a small amount of storage space and no tools.