Teaching the alphabets at what age?

It's never too early In fact it maybe a good thing to start reading to them even when you are pregnant. Always keep communicating with them openly

as a baby, they learn v fast and gets interested when reading to them. so i started when he is 2mths old.

Never early. Once born, you can start singing the ABC song

My kid is 4 and still doesn’t recognise the full alphabet

thanks

as soon as he/she starts talking/calling papa n mama

2 years old, start with ABCD song