Most American children eat potatoes. But many children don't know which part of the potato is the best for food. Take a knife and cut a slice (薄片) of potato from the middle as thin as paper. Hold the slice of potato against the light and look at it. You will see that the potatoes has skin, outside rim ( 边缘) and inside part. The outside rim, which is right under the skin of the potato, is more valuable than other parts. But people usually throw it away with the skin. Even the skin itself is better for food than the inside part. When eating a cooked potato, if you choose the inside and leave the outside, you are throwing away the best part of it. If you can't eat the whole potato, you can eat the outside rim first and leave the inside.