This small catapult can be build with less than 40 LEGO pieces.
When equipped with a strong rubberband, the catapult is capable of firing a 1x1 plate 
well over a meter.
The catapult is unsuitable for assaulting strong fortifications, but can be used to 
clear the paraphet of less well protected walls.
4 minifigs is required to operate the catapult.