What is this engineering task?

To make a device or toy that shows the transference of energy.

What are you thinking about doing? 

I’m thinking of making a wireless energy transfer device.

This is a video explaining how wireless energy works and how it can be improved though coupling; Highly Coupled Magnetic Resonance.

 

This is a video showing how to make an oscillating circuit to get higher resonance for longer range, but explained the process in a very difficult way and didn’t show how to build the circuit itself.