I've been to Six Flags many times since I've lived in St. Louis for years and would probably give them a better review but if someone went on just this day without season passes, they would likely not return so with that visit alone I would have given them two stars.
Elephant toothpaste reaction. Elephant's toothpaste is a foamy substance caused by the rapid decomposition of hydrogen peroxide. This is often used for classroom demonstrations because it requires only a small number of ingredients and makes a volcano of foam.
Here's what I've found can sometimes lurk in your toothpaste: Tin: Yup, tin. Toxic, toxic tin. It's found in one of the three kinds of recognized fluorides under the name stannous fluoride. If you're not going the fluoride-free route, it's best to pick one of the other, non-tin fluorides, like sodium monofluorophosphate, which is less toxic.