My Son is 5.5 years and he has started lying is ot normal

A. Basically they do not understand the difference between lying and not like for them every thing is just black and white they do not understand so you’ll have to explain it to the child and then only a chalice Veedu understand this is what you should not Lai and why you should not lie why should you not be saying Falls change this is how gradually you can teach a child