You need to behave well and try to set an example to others.

你们必须好好表现，尽量给他人树立榜样。

Well that's good to hear and by showing modern parenting skills it may set an example to other parents.

恩，这个消息不错。通过展示现代育儿技能，他们或许可为其他父母树立榜样呢。

To " model" something means to set an example, to show someone how to do something.

“塑造”某事意味着树立榜样，向某人展示如何做某事。

So I wanted to play something for her to set an example, to show her, you know?

所以我想给她弹点什么， 树立个榜样？