I agree with the other reviewer about the narrow window with the 3 boxes max being too limited. I work with my daughter to look through all of them first and i ask her to tell me the story before I let her put them in place. This is anther app where you can trial and error your way to success. I group the like colors together to make it easier for her to see them all at once. I like that there are multiple 'stories' at once to teach them to filter unnecessary information, which is unique to this app (of the ones I've sampled, of course) but I do wish it was easier for a child to manage that area.
Also, I have no idea what the locked sections are, far as I can tell there is no description in the app. I get the minimalistic no words approach, so perhaps opening up the first activity in each section would give us an idea of what you're selling.
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