Here is some food for thought!

Original project page: Emergent Tool Use from Multi-Agent Interaction

Download paper (Baker, B., Kanitscheider, I., Markov, T., Wu, Y., Powell, G., McGrew, B. and Mordatch, I., 2019. Emergent tool use from multi-agent autocurricula. arXiv preprint arXiv:1909.07528.)