If it's only one LED ran on a 1.5V disc battery.
Then you're going to need at least about a 12 gauge wire, solder, soldering iron, and a miniature snap switch. if you have a access to these items then you're good to go.
But if you want to forgo the wires, you can use a circuit writer conductive pen to draw the circuit directly onto the prop. However you're going to need to do some insulation in order to isolate where the electricity is going.
I hope this helped.
When in doubt, just take the next small step.
With that next step take a deep breath. It calms the mind.
When the mind is calm you realize the best is still yet to come.