My toddler son has recently taken to carefully removing all the books he can reach from the bookshelves, stacking them neatly on the floor, sigh, and return them to the shelf, commenting dolefully "heavy book" from time to time.
It's like Sisyphus, but self-inflicted. Why?
He also hugs bus stops, murmuring "my best friend" affectionately.
And he has recently started having Jekyll n Hyde style personality transformations where he suddenly announces that he is now called Pan-dank and rampages around being destructive, before stopping (" I DSname now again").
What utterly weird things do your children do?