My 3 y.o loves this app. We do it together almost every evening. The story is pretty good with a young DaVinci (Leo) and a young Galileo (Gali). In this story, you are helping Leo get ready for Gali's Birthday. The interactive portions deals with counting, shapes, colors, art, letter recognition and even spelling. Some of the activities adapt to your child's skills, so as you play, the activities change and aren't the same each time (i.e. may need a different number of something to complete a task from previous play). In Appisode 2, they introduce a young Marie Curie. Granted the history is off since these figures didn't live at the same time, but it does introduce youngsters to prominent figures in scientific history.