I think the question was legitimate. Some people may have lots of ideas for projects but they aren't sure of which ones would be best. Or, perhaps, they are looking for ideas that might be even better than their own.
To answer your question, the Tesla coil, in my opinion, is one of the most interesting projects anyone can build. There are various different styles that you could chose from, including the classic spark gap tesla coil (SGTC), the solid state tesla coil (SSTC), the vacuum tube tesla coil (VTTC), the tesla magnifier, etc. There is a whole variety to chose from, if you are interested. You can start by simply googling "Tesla Coil" and you'll be able to find all the information you need.
I hope this helps, and good luck with your final project!
Best regards,
Der Strom