ReSpeaker – Open Source Voice Development Board with Microphone Array

It can be built as an Amazon Echo clone.

But the most important feature is that you can embed it to your product/object but with advanced voice technology, such Far-field Voice Capture, Beamforming, Acoustic Source Localization, Nosie Suppression, De-reverberation and Acoustic Echo Cancellation.

And also it contains a lot feature, such touch, Arduino compatible, expansion header pins, etc. So if you want to build a funny toy instrument, ReSpeaker should be good choice. Or embedding ReSpeaker into a robot which you can chat with.

Besides, it's easy to develop another hardware module motor driver.