The Pyrotechnics And Nasties Disposal Automaton

This robot picks up dangerous (toy) objects and drops them in a bowl of water.

The next video shows a very early version of the robot, made entirely in Lego

How does it work?

PANDA senses the candle using two touch sensors in its claw.
It then closes its claw and lifts its arm to pick the candle up
It reverses until it senses the edge of the table, then goes forward a bit so there is room to turn; turns round; goes forwards; drops the candle and turns round again.

PANDA at Christmas

It's not all dangerous work for the PANDA though, sometimes he joins in with simple domesticity