There is no better way to learn electronics and technology than building and programming your own things. This Voice Controlled 3D Printed Tricopter project shows you what it takes to build your own drone and control it with Amazon Alexa.
The drone has 3 propellers. You will need 3 brushless motors, 3 motor shafts, power distribution board, and a few other parts to pull it off. You will need a Raspberry Pi and Amazon Echo too.