Explanation:

- Bangles: These were commonly found in the Indus Valley civilization, as people wore ornaments made from materials like shells, terracotta, and metals.

- Toys: Archaeologists have discovered toys such as miniature carts, animals, and figurines in the Indus Valley, indicating their use in daily life and play.

- Rings: Jewelry, including rings, has been discovered in excavations, showcasing their craftsmanship and adornment practices.

- Documents: This is the correct answer. No written documents like those found in Mesopotamia or Egypt have been uncovered. Although they had a script, it remains undeciphered, and no extensive records have been found.