How I know I’m now a mother more than anything else?!
All alone in the house, I go “Don’t get scared, I’m plugging the vacuum cleaner. 1, 2, 3 !” and then laugh for two whole minutes when I realise my son is in kindergarten and that he no longer gets scared when the vacuum cleaner powers on, anyway.
I play My Talking Tom at night so that my son has coins in the morning to feed the damn virtual feline.
I build Lego Creator cars when he is out of the house following the instruction leaflet so that he has a new vehicle to play with and study when he arrives home.