Toy car, accessory thereof, and toy car system

A toy car system comprising:

• a block, the block having an upper surface and a side surface;
• a toy car, the toy car comprising a housing assembly and a plurality of wheels provided on the housing assembly, the plurality of wheels being rotatable with respect to the housing assembly, the plurality of wheels being configured for engaging on an upper surface of the block and rolling along the upper surface of the block;
• and
• a limiting member, the limiting member being connected to the housing assembly and for abutting against the side surface, the limiting member being for limiting the plurality of wheels on the upper surface of the block;
• wherein the limiting member comprises a first limiting arm, and
• a second limiting arm,
• the first limiting arm is provided with a first connecting shaft, the first connecting shaft is connected to a first guide wheel;
• the second limiting arm is provided with a second connecting shaft, the second connecting shaft is connected with a second guide wheel, the first guide wheel and the second guide wheel are for abutting against the side surface of the block;
• wherein a distance between the first guide wheel and the second guide wheel is larger than or equal to a transverse width of the block;
• wherein the side surface of the block is flat;
• wherein the upper surface of the block is substantially flat, and there is no guide rail formed on the upper surface of the block.