Teaching kids online is challenging. You need to know what they are interested in and what kind of topics are related to their interests. For example, if they like paper airplane, you can try using it as a discussion topic. e.g. What kind of problem do they have when making a paper airplane, or how to make a paper airplane in a better way and so on. Using all these questions as contents of the class, you will draw their attention. Perhaps, you can talk about the social media or games they are playing, such as TikTok. These are all great materials for class.