It’s a good time for him to start learning how to write his complete name.
Many children will only recognise the first letter of their name to start, and that’s a good place to begin.
Use large pieces of paper and write his name in large letters. Have him trace over the letters with his finger or a crayon as you say each letter. Then, have him try to write the letter himself. You may have to demonstrate it first. Make it interesting by using common items to describe each part of the letter. For example:
J – The letter ‘J’ is a straight line and a hook.
A – The letter ‘A’ looks like daddy’s ladder.
S – The letter ‘S’ looks like a snake.
O – The letter ‘O’ looks like a ball.
N – To write the letter ‘N’, we go up, down, up.
Keep practicing and soon your child will know all the letters of his name.