Multi-competence means being good at more than one thing. Just like how you are good at playing with toys and learn new things in school, people can be good at different things too. For example, someone may be good at playing the piano and also know how to speak different languages.
When you are good at more than one thing, it means that you can use all your different skills and knowledge to do things in new and interesting ways. It also means that you are able to help others in different ways too. Just like how your friends might ask you to help them with puzzles or games, people might ask someone who is multi-competent for help in different areas of life.
Being multi-competent is really cool because it means you can have a lot of fun and do many different things. And as you grow up and become more experienced at different things, you can keep on learning even more new things and becoming even more multi-competent!