What did the Incas make?

Answer 1

The Incas invented the quipus, which had colored strings that they used for counting. They invented a drum and Flute. Their craftsmen made objects using copper, gold, and silver and their buildings had sloping walls and interlocking blocks.

Answer 2

Ok, first off it is the Incans and they made drums out of human skin, flutes out if human bones and different kinds of jewelry made from various kinds of body parts.