High speed calculator Baby or kids and child development training in mathematics in the plus and minus or subtract single-digit numbers beginning with a positive number game for the period specified. In the game will try to give children practice the correct answer. Given the random questions raised by the system, the number two sets up. Illustrated is the number that we can count them. And then select the correct answer within a specified time before going on to the new computer.
||Compatible with iPhone 4. iTunes account required.