Most children have been said to play with whatever they can find, such as sticks and rocks. Toys and games have been unearthed from the sites of ancient civilizations. They have been written about in some of the oldest literature. Toys excavated from the Indus valley civilization (3010–1500 BCE) include small carts, whistles shaped like birds, and toy monkeys which could slide down a string.
The earliest toys are made from materials found in nature, such as rocks, sticks, and clay. Thousands of years ago, Egyptian children played with dolls that had wigs and movable limbs which were made from stone, pottery, and wood. In Ancient Greece and Ancient Rome, children played with dolls made of wax or terracotta, sticks, bows and arrows, and yo-yos. When Greek children, especially girls, came of age it was customary for them to sacrifice the toys of their childhood to the gods. On the eve of their wedding, young girls around fourteen would offer their dolls in a temple as a rite of passage into adulthood.
The oldest known mechanical puzzle also comes from Greece and appeared in the 3rd century BC. The game consisted of a square divided into 14 parts, and the aim was to create different shapes from these pieces. In Iran "puzzle-locks" were made as early as the 17th century (AD).