A cool math game that is available online is "2048" and is offered as a mobile application. Cool Math 4 Kids offers math games geared toward children, including "The Timernator" and "Arithmetic Game."
The goal of "2048" is to add like-numbered blocks until the numbers add up to 2,048. For example, combine two blocks with the value of four, and they combine into one block with the value of eight.
"The Timernator" and "Arithmetic Game" are both timed games where children may practice their arithmetic. In "The Timernator," they have one minute to solve as many math problems as they can, while "Arithmetic Game" requires children to fill in the blanks of a series of equations.