What is the meaning of "mud cart, tile dog"?

What does mud cart waddle dog mean: [ní chē wǎ gǒu], meaning small mud cart, small waddle dog. Children's toys.

Origin: Wang Fu (王符)《潜夫論． Floating Luxury": "Or to make mud carts, wagons, horseback riding, advocating rows, all play children's toys to trickery." Later, the term "mud car, tile dog" was used to refer to children's toys in general.

Extension: toys: [wán jù], a general reference to objects that can be used to play, playing with toys in human society is often used as a way to teach and entertain.

Toys can also be natural objects, i.e., sand, stone, mud, twigs and other non-artificial things, toys should be understood in a broad sense, it is not limited to the street for people to play with things, all can be played with, look at, listen to, and touch things, can be called toys.

Generally speaking, children's toys are designed and manufactured for a specific age group of children, and their characteristics are related to the child's age and stage of intelligence. The use of children's toys is predicated on a certain level of adaptability.