I have a younger brother that is getting into archery and shoots a low poundage bow(I think its like 35-40# if I remember right) He needs arrows and doesnt have a archery shop anywhere near his house so he has to go to walmart. Well he called me and I told him the right spine he needed(.600). But he's not sure how to find the spine on the arrow. So all I need to know is if Walmart sells youth arrows that will fit his needs?