Interaction design is like designing a fun game! It's all about making sure that how people use websites, apps, or other kind of technology is easy and enjoyable. Interaction designers think about how people will interact with something and try to make it as simple and enjoyable as possible. They will ask questions like: Is this going to be easy to use? Is it visually pleasing? Will it be helpful or confusing to the person using it? That way, when people use something that's been designed by an interaction designer, it should be easy and fun to use!