Help to build project

Im currently a electronics student, and we got a project comming upp, but to be honest we dont know what to make, so I was wondering if enyone has eny smart ideas.

We couldn't make a Tesla coil becouse of the power supply. Enyways we might build it ? (cheap as possible)

thanks for every answer i get.

Sincerely
Nils PS

THere are so many you can build but i would recommend you build a
wireless project. I have quite a few wireless circuits. Many are available on the internet.