Skinny 8 year old boy

[Spudnik21]

I am just looking for a bit of reassurance/ ideas to put some weight on my DS .
He is 8, and so skinny you can see his ribs at times.
He has breakfast at home ( this morning 2 wheatabix ) then gets toast at before school for his second breakfast. Lunch is a packed lunch which apart from the apple is eaten. ( sandwich, yoghurt, cheese, crackers , kitkat, apple) He says he has a carrot from the afternoon snack bowl at school. Then he goes yo after school where he gets a substantial snack ( their words, filled pitta, or pasta or a slice of pizza) then he has his tea at home which last night was 2 eggs some chips and toast .
He is a very active child, he does jujitsu , archet, cubs and brass band, swimming with school.
We don't do puddings in our house I am thinking I might have to introduce it for him.
Is it normal for them to be this skinny ? As a baby he was a 10lb crumper!

Skinny is fine. But one (possibly imaginary) carrot as his only fruit or vegetables all day is not.

You should be able to see the ribs of a 7 or 8 yo. That is a healthy weight

It could be. You would also be able to see the ribs on an underweight child. So you actually have no idea without seeing or weighing the ops child if he is underweight or not.

Thank you everyone.
He hasn't been weighed at school. We don't own a set of scales at home. None of us are large so have never had a need to own any.
Compared to some in his class he is skinny, which set me worrying.
He is offered a variety of fruit and veg. He doesn't eat them, and I am not forcing. Myself and his dad both have a lit of veg on our plates and he knows if he fancy something he can dip into ours.