Even a bright sun in the sky wants you to become intelligent, educated and smart. Meet the game Happy Sun Yay! , where the heavenly body becomes your teacher and mentor. The smiling sun has prepared for you a bunch of mathematical examples that you need to solve, showing that you are not in vain to go to school. The tasks will be unusual, they are for addition and subtraction, but with the use of balls, pencils and goldfish. Add or subtract sets of objects or objects by selecting the correct answer after the equal sign. In the upper left corner will be counted your success.