While these aren't marketed for diabetic children, they are great for them.  Diabetics are supposed to be extra-careful with rubbing, blistering, and injury to the feet and legs so we rely on seamless socks.  The quality is fantastic.  I downgraded it a star because the packaging is such that makes the plastic things holding the socks together snag the socks.  If you are very, very careful you can remove them without snagging, but there is one extra step I've seen other companies take that could prevent snagging altogether.