It sounds similar to Pop Rocks. The “rocks” were colorful and not crystal-like but the experience sounds quite similar. I wonder what exactly is popping. Lol! It’s funny when you think you’ve finished eating it and then you get a final surprise pop.

Thanks re the game. We learned a bit from it. At the end of it we felt happily— aged. It helped that the cookies were delicious. 😃
Thanks for stopping by.