Do you want to learn how to count well in your mind? Are you looking for an interesting simulator to improve your knowledge of mathematics? Launch this online game and take regular practice in calculations. So that the classes do not seem boring, the examples in the game are created from colorful shells and laid out against the backdrop of the sea. Solve the example by moving the shell with the appropriate number to the "=" sign. At first, the examples will go for addition and subtraction with numbers up to 20. Then the tasks will become more and more complicated. You have to multiply, divide, add or subtract tens. You need to decide in the game quickly, until the timer bar runs out, otherwise you will lose.