A fun probability and odds activity!
I used it when I taught math 7. The objective of the activity is to have the students perform an experiment to see which position a paper cup will land on most often. I used small Dixie cups and the students had a blast. The students need to calculate the fraction of the tosses that landed on each possibility (side, rim side up, bottom side up). They then have to answer what position is more likely to occur if they tossed it again and why. They are then asked to write a ration and find out how many times it would land on the side if tossed 1,000 times, and why they think that. They then perform the same experiment with the cup cut in half and answer similar questions.
This took my students one 45 minute class to complete, but it was time well spent. I tied it into a lesson about how we use math in the sciences as the students were working on their science fair projects as we did this.