Help your kids practice addition and subtraction the fun way!
Kidz Addition! has animations and sounds to entertain kids while they practice their math skills.
You can set the highest number to be used in operations, so kids can learn by adding small numbers (say 0 to 10) and you can keep your brain active by practicing with very large numbers (for example 8 digit numbers).
It is also strangely addictive for grown ups!