at what age should chilren start to write
Â· just now. Report Abuse. I work at a preschool with kids 3 to 5 years old. the 3 year old should know their letters and alphabet but we don't expect them to know how to write them.at age 4 they should start writing their letters Capital and lower case. just now. Report Abuse. I work at a preschool with kids 3 to 5 years old. the 3 year old should know their letters and alphabet but we don't expect them to know how to write them.