Quick Take: There's a certain sameness about iPod cases, so we were happy when Speck released these two texturized rubber designs that give you something interesting to hold onto. Both the Grass and Cloud FunSkin cases come with detachable belt clips and removable plastic screen covers that fit semisnug under the rubber, although we'd prefer it if they were built to stay in place. They're probably better choices for kid Nano users: Cloud makes your iPod Nano look like it was designed by the Michelin Man, while Grass looks like an interesting novelty that you'd buy on a whim and later regret.. Still, for the young and the young at heart, they provide fun shapes and serious protection.