Rocks have many uses beyond just skipping, climbing, and collecting. They can be used to build houses, bricks, fireplaces, and some kitchen counters. Roads, sidewalks, garden paths, and ceramics are also made from rocks. Metals, pencils, chalk, coins, jewelry, sand castles, and glass all originate from different types of rocks. Rocks come in many shapes and sizes, from tiny grains of sand to gigantic boulders, and are found both inside and outside homes.