The Nike Air Max 90 looks great in GS sizes. Something about the length versus the build up of the shoe gives it this chunkier feel that looks a bit cartoonish and fun on those smaller feet.

This colorway is made to go with anything and if you are copping them for kids they should last a bit longer since they are black. The Nike Air Max 90 - Black Green shoe has a total nubuck upper and is totally black aside from the white lining, swoosh and midsole. These are set to release to retail soon and when they do they wont be hard at all to find.