my 2 yrs 3 month old son won't learn anything like letters colors whatever the learning skill. even dt want to to coloring and any activities. only play with his toy and watch TV. as a working mother I can't give him too much time he can start talking lots of sentence and words. due to this covid situation we are not putting him in pre school so I am worried that does he is late for learning. what is the perfect age for learning and pre school.