I created this project for my 7th grade science class, but it is appropriate for any middle school grade. It would also be great for ICP in high school. You can reduce the number of requirements listed to fit the needs of your class.
Students will create an original board game to learn about work and simple machines. I put my students in groups of 3-4. To begin, I have the groups brainstorm and talk about their favorite board games. I have them make a list of these games to use as inspiration. After they come up with an idea, I have the groups name their game and write out the rules. I look over each group's rules/instructions and approve them before they begin (of course, many of their rules evolve while making the game). I provide the students with a grading rubric as well as a checklist with everything they need to include. The content students must incorporate includes vocabulary and real world examples of the simple machines (the checklist is specific to the textbook I use but can easily be adapted). Part of their grade is based on peer assessment and self-assessment. I've included these rubrics as well.
I block out about 7 days for this project (45 minute periods). I have the groups play their own game before deeming it finished so they can fix any issues that may come up during play. After all groups are finished, students will play another group's game to peer assess.
The project is worth 100 points in my class, but the rubric can be adjusted to fit your needs.
*Note - I provide my students with half of a poster for the game board. This seems to be a good size.