Last year I found an activity from a sample textbook series that I really like for geometry terms.
I bought foam circles from the Dollar Tree and wrote letters on them with Sharppies. Then I used magnetic tape and 3M tape to post the circles around the classroom.
The textbook even shows how to set it up.
Here's what it looked like for me:
I included the game at the end of this worksheet done in class:
It goes with this powerpoint where students were given descriptions and had to draw a diagram, then looked at diagrams and had to labeled them.