What is parenthesis and how do we make it fun? Parenthesis is when you add extra information to a sentence to give more detail about something and the brackets, dashes or commas we use to help add the extra words are sometimes called parentheses. Children will learn about and be encouraged to use this in their own writing in key stage two. As with many types of grammar and punctuation, learning about it can be boring so he made a game to help this concept be fun to learn and memorable as there a