I'm still working on the problem of why is the sky blue? Now, I've already told you its because the short-wavelength blue light is scattered more than the long-wavelength red light, but why are short wavelengths scattered more than longer ones? In words suitable for a blog.
I could do some maths to show you that's the case, but that's really a cop-out. (Plus most of you wouldn't follow it.) I think if a physicist has to resort to maths to explain something, it means he doesn't understand it himself. (That said, you will struggle to do physics without being reasonably competent at maths - since maths provides the language in which physics is often best expressed.)