I discovered these socks in a Gold Toe outlet store a year ago (which I frequented, because Gold Toe are my husband's favorite socks, - but I didn't realize they made socks for kids, too).  Since then these are the only socks I buy for my 5-year-old son, except for light-weight summer socks.  These socks are fairily sick, so they are warm and cushioning.  No holes so far, in spite of heavy wear.  Very good quality 3-season socks.

As a bonus, if you have kids of different ages, it's a no-brainer to sort socks by size: small socks have one gold stripe at the toe, medium socks have two stripes, and large ones have three.  So smart!