Here are a few of my favorites:
This one we have used already this year. It is great for doing Octal and Hexadecimal numbers. It really gets the point across that hex and octal are a more compact way of storing large values. When you pull the cups apart you have the number written inside...I'll try to post a picture of the Hex-Cups to make that clearer.
We already do the Analog-Binary Calculators - which my kids call Flippy-Dos, so the cups have become Roley-Dos. And seriously - the flippy-do is the easiest way to show twos comp for negative numbers.
This would be great for showing the sequencing of code. My beginning students have a hard time sometimes getting the ordering of the commands. This could be a fun way to demonstrate how important the order is. They could work in pars with a whiteboard and follow each other's commands.
This is a review game - the site includes the cards for the pockets. This would work well for AP style problems