Today I explained special relativity to my eldest daughter.
At her age (12 years old) I was struggling to understand it by myself, because nobody was able to explain it to me.
It took 2-3 year to really understand it despite reading anything I could about it: I remember the day when I was trying to explain what I did understand about it to a schoolmate and pieces finally went all in place.
Now she grasped the implications of c as a constant despite the reference system in roughly an hour.
Her smile was... amazing.
I feel so proud...
(I had to tell this to someone)
@Shamar I tend to think that special relativity could be easily explained to most older toddlers if the person doing the explaining understood it well themselves. To me it seems like a fairly simple topic that is never really explained well.
Oh, that time isn't the same for everyone depending on how fast they're going etc. etc. in some bizarre nearly incomprehensible way that implies consciousness is somehow a physical entity [skull explodes]