iBubbles is a Math-Trainer especially developed and designed for kids from about 6 to 10. Simple multiplication (all tables up to ten) can be exercised in a playful way. Kids can choose between a trainingsmode and a quizmode. During the training there is no time pressure. To enhance the learning effect the player can guess several times until the right answer was chosen. In the quizmode the tasks should be solved as fast as possible to gain maximal points and to show up in the highscore. iBubbles is suitable for beginners as well as for advanced players as there are different difficulty levels selectable.