lex with talking avatar

Yes but you'll have to integrate a 3rd party chatbot platform such as "Zoovu" or "Soul Machines". These platforms can be integrated with Lex by using the Lex runtime API to send and receive messages between the chatbot and the conversational avatar platform. This allows the chatbot to communicate with users using a talking avatar, providing a more engaging and interactive experience.

AWS also provides an open source web-based avatar solution that works with Lex called "Amazon Sumerian Hosts". It works with both the BabylonJS and Three.js JavaScript 3D frameworks. Here is a repository containing a number of demos you can use as starting points - including a Lex v1 demo and Lex v2 demo. You can also see video versions of these demos in this YouTube playlist.