I'm actually curious if there's research on how learning is impacting by the presentation of the material and how fun the activities are. Naively, I'd think those old educational software I've seen worked better because by being fun, they encouraged the child to try and solve puzzles, do activities longer.
I have a child who is soon going to be 3 and I'd like to let him play some educational software 30 minutes a week or so so I'm actually actively interested in figuring what is something that's good, fun and has the most positive impact. So if anyone has some relevant studies etc... I'm all ears