What stands out to me is the apparent "quirkiness", which could be compared to Comic Sans. I built a website a few years ago that used Comic Sans, quite correc

What stands out to me is the apparent "quirkiness", which could be compared to Comic Sans. I built a website a few years ago that used Comic Sans, quite correctly. How can that ever be so, you ask? It turns out that children under 10 are more likely to engage with content presented in Comic Sans than "plain" fonts. Seeing this, I can't help but wonder if someone could design a quirky, "fun" font specifically to appeal to children, which incorporates the same ideas used here - perhaps exaggerated even further. Undiagnosed dyslexia is a significant cause of children falling behind at school, so there's a lot of potential benefit in getting that design right and then producing learning materials with it. As is, this could even be used as an simple test for dyslexia, by A/B testing quizzes of roughly the same difficulty, presented in different fonts. Children whose scores differ significantly should be given a more thorough test for dyslexia.