Your child will be guided through the original activities by 5 friendly characters. The content "library" includes interactive videos, books, and activities (both for math and reading). There are assessed activities as well as open-ended tasks. There are also able to collect accessories like bugs, hats, and toys for their favorite characters.
As a dad of two (Sydney 9 and Jack 6) I know there are numerous apps and websites geared to engage and help with learning. I feel like I have seen (and tried) them all. I have to say, Khan Academy Kids is the best and easiest to navigate. Plus, it is free. Can't beat that!
Embedded below is a 1 minute and 44 second YouTube video from Sal Khan himself as well as a 2 minute and 23 second YouTube video I created showing you some of the ins and outs of the app.