Please could someone recommend a good kids' bike helmet?

[Lulworthblue]

I need a new bike helmet for my ds.
He is just starting to (belatedly) ride his bike without stabilisers and his old one is too small.
Are those without visors like the Kiddimoto ones safer or less safe?

Sorry I don't mean visors, I mean the sticky out aerodynamic shape ones, or the flatter ones.

They are all equally safe,but avoid full-face helmets as they can't hear instructions or traffic so well.

If you've got a Halfords near you, I'd recommend going there and getting one fitted. They were really good with DS...

Thanks for this. I was curious about the flat ones versus the aerodynamic ones so that helps.