Need Suggestion for my Final year project in robotics

I want to make something new, interesting. Not just a simple L.F.R. or something like that. I know basics about how to use a microcontroller.
How to glow a LED, seven segment, LCD
Running of DC motor, stepper motor
L.F.R.
Maze solver
PC controlled Robot
GSM controlled robot
And a bit wireless also.

I dont want to make these simple projects. Something big.

I hope u got me. Please help me with this. I will be thankful to every1. 😕