What can your 4yr old do ?

[Notyet20208]

My ds whos 4 ( 5 in February) seems behind in some ways so i thought id see what others do.
Only says 20 words and two word sentences such as want milk.
Stil draws lines etc
Hits out at me and siblings
Very very active never sits down.
Cant be trusted on scooter outside as he has no road safety. Will go on to road while im telling him not to etc.
He can count to 10 and say colours.

A kid may be wearing a nappy under their uniform!
They get changed for PE, it would be immediately obvious to the other children if one of them was wearing a nappy.
Why try to imply nappy wearing school children are anything but a complete anomaly? It's not particularly helpful.

Op he hits and is "violent" because he cannot express himself any other way and doesnt uderstand. He and you need support. He wont grow out of this or change behaviours without the right input.