"How learning could be fun for kids?"
I found grammatical errors in days 4, 5, 7, 8, and week 2 (which is where I ended my search.) I assume there are probably more grammatical errors as well.
Perhaps the standards have gotten so low that not even the people running the contest know the difference between correct and incorrect grammar and simple sentence structure.
Quite sad that 1) It's so endemic, and 2) Nobody even notices anymore.