Dragon box has become my favourite app producing company for pre-schoolers. The original dragonbox program was my favourite. It was quite amazing to see my four year old work through the different levels. He and I were compelled. However in some ways it was not obvious that this really had great educational benefit for such a small child. Who knows what he would remember in the future? This one is just fantastic. Even after a couple of days play it was clear my son was gaining much greater facility with numbers and more than that was completely charmed by the program. I think this beats my previous favourite maths apps made by montesouri and really I think most four to six year olds could benefit from it as they start to discover the properties of numbers. Only complaint. The app seemed to ask for a lot of privileges when I installed it. I denied most of these, especially about giving access to my phones call facility(?). It seems to work fine but I wonder if this means I will now not get emailed about my son´s progress? Some info clarifying all of this would be helpful DragonBox.