They do not stock dirt bike helmets at Thunder Tower. I would recommend Cycle Gear for that. A Bilt brand helmet would be good for someone just starting out but still growing.
I concur with everything Mark Rouintree stated.
If it were me I'd go by the local Yamaha, Suzuki motorcycle shop which I believe is called Columbia Powersports. They sell smaller dirt bikes for kids, I'm sure they have dirt bike helmets. Honda place is Carolina Honda, they sell smaller dirt bikes also so should have a selection of younger/smaller sized dirt bike style helmets.
Cycle gear would be your best bet for anything dirt bike related
I don't think they have them in stock, but I'm sure they would be glad to order one for you. Great folks.
When I was there I only saw motorcycle helmets
I haven't seen them either
I've never seen any dirt bike helmets in there. I'd say no dirt bike helmets
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