One of the best games I ever played was a game that several fifth-graders had invented. It involved shooting a basket, then running a diamond backwards, jumping rope… I don’t remember all of the things you had to do to score, but it was a blast! (And I came in last – no surprise.)
Making up rules for a new game is a great authentic project. The project can involve reading (reading about other games and rules to get ideas), writing (recording the rules, and editing after you follow the rules to see if they covered everything), and math (developing a scoring system).
With social distancing and other limits to what kids normally play, it is a great time to invent a new game that can be played and enjoyed with the limitations currently in place.