They are called Fly Agaric, a species of Amanita. Fly agarics are actually one of the few species of mushrooms that make you high, called psychedelic mushrooms/ Psilocybin.
Another fact: Psychadelic mushrooms can actually benefit you mentally, and sometimes physically. Studies have shown that it can cure depression, anxiety, etc but should ONLY be taken when your brain is fully developed at 18 years old.