Provided are a versatile track block for creating a track that is capable of securing a more dynamic range of motion for toy mobile object, rather than merely a toy block moved around by hand, and a track plan in which the order of colors or patterns of blocks on the track is recorded as a program. Projecting parts 100, 100 and recessed parts 101, 101 capable of mating with the projecting parts 100 are provided clockwise around the four sides of a block 1. A step part 16 is formed on the upper face of the block 1, and a magnetic plate 2 is set into this step part 16. A track can be created using a plurality of blocks 1 of this sort. In addition, blocks 6 comprising curved magnetic plates 24 and the like can be used to create a three-dimensional track that can be traveled in three dimensions.