Fireboy And Watergirl Cool Math Games is a popular online game series that features two characters with different elemental abilities. The player can control both characters simultaneously or play with a friend in a cooperative mode. The goal of each level is to collect gems and reach the exit door while avoiding hazards such as fire, water, ice, and green goo. The game also incorporates math concepts such as angles, fractions, and logic puzzles to challenge the player's problem-solving skills. The game series has five installments, each with a different theme and gameplay mechanics. Fireboy And Watergirl Cool Math Games is a fun and educational way to enjoy some adventure and teamwork.