There's a similar commercial product I've used for mental warm-ups in my classrooms over the years: Rory's Story Cubes (plastic, in paper and plastic packaging)

There's a similar commercial product I've used for mental warm-ups in my classrooms over the years: Rory's Story Cubes (plastic, in paper and plastic packaging). I suggest making your own and using icons from The Noun Project (https://thenounproject.com https://thenounproject.com) as stencils or inspiration for quick freehand pencil or woodburner. The barrier is higher, but the personalization potential is much greater. Not stressing about quality helps lower the barrier, and if the cubes are for personal use, all you need is good-enough representations.