Hopscotch is one of the simplest of children's outdoor games and also one of the oldest. Even so, it needs quite a lot of skill. Several squares are marked out with chalk on the ground in a variety of patterns. The players throw a stone into each of the squares in turn. They have to hop and jump to reach the stone and then hop back to base, going through each square in the proper order. Marks of hopscotch games have been found scratched on stone in the remains of Roman towns.