Math lessons and fun games for kindergarten to sixth grade, plus quizzes, brain teasers and more. First, pick what you want to do: Then, pick what kind of numbers you want to use. You can pick based on. Webcool math games (branded as coolmath games) [a] is an online web portal that hosts html and flash web browser games targeted at children and young adults. These games have no violence, no empty action, just a lot of challenges.