This is a really fun game where students can work on their musical alphabet, intervals and chords.
Changing Cups Challenge is inspired from an idea on Pinterest.
You need some foam coffee cups and sharpe pens. Take 3 cups and stack them together. Then write the alphabet around the edge of one of the cups, spacing the letters out evenly. Write the alphabet on the other two cups so that they line up evenly with the first cup. The letters should line up and you can spell different chords with by rotating the cups.
Now you can need to make a cup with a flat alphabet and a sharp alphabet, so you can have all the major and minor chords
Other possibilities are making intervals. Can you name the interval displayed?
Another idea is to build inversions.
For beginner students you can have them stack the cups in alphabetical order. What comes before the first cup? What comes after the last cup? Can you play that note? Can you play all the notes on the cup?
I also discovered students like stacking the cups, so I created a set to stack. See the pictures below of a student stacking a skipping alphabet.