Marton Helenyi

Do you know the country flags and the capitals? How many of them? This is a unique way to learn and practise them! Not a boring "select the right answ …

What can you do in a pitch black maze?Probably without light, there is nothing to do... But what if you can create light by answering questions, and s …

This is a very simple app based on actual needs. If you have learned Kodaly's hand signs, solfa, and it is hard to switch between the normal five line …