First, we can let the children imagine their birthday party. At the birthday party, everyone will have a chair, and there is a label on the chair with everyone's name written on it. In this way, we can tell the children that the first person to attend the party is sitting in chair 1, the second person to attend the party is sitting in chair 2, and so on. This is the basic concept of ordinal number: numbers are used to represent the order of things in a series of things.
Next, we can help children consolidate their understanding of ordinal numbers through some games. For example, we can let the children form a circle and then count off from 1. After a certain number of reports, the child will stand up and continue to report. This game can help children better understand the concept of ordinal number, because they need to remember the order of themselves and others.
In addition, we can also let children participate in some simple housework activities, such as setting the table and arranging toys. In these activities, we can teach children to complete tasks in a certain order, such as putting dishes first, then plates, and finally cups. In this way, children can master the concept of ordinal number in practice.