Pop Rocks don't taste that great, but they make up for it by being fun to eat. You put them in your mouth and they start to fizz and "jump" on your tongue and teeth. You can even hear them popping. This is a sound like soda if you shake the can before opening it. If you open your mouth, it is even louder.
They basically taste like pure sugar, no matter what flavor you get, and they are the consistency of sea salt. I usually get the cherry or watermelon, which both taste, surprisingly, almost exactly the same.
Be careful with your Pop Rocks because they get very gross and stick together if any part of the pouch gets wet, or if you have them outside during humid weather. I’ve opened them outside during the summer only to find them to be a hard crusty clump that is impossible to get off of the wrapper. They also get sticky very quickly in your hand, so I like to pour them directly from the wrapper into my mouth.
You can eat them with Coke and not die. Don't worry. That actually just increases the fizziness. My friends and I tried it a few times in college. It is good, cheap entertainment.
I’ve gotten these for kids I tutored for a couple times. They were a huge hit.