Kid President - How To Change The World with Kindness. Teaching kindness to children is part of the fourth National Health Education Standards: Students will demonstrate the ability to use interpersonal communications skills to enhance health and avoid or reduce health risks. Learning to be kind helps build a positive learning environment.
The stone-throwers took two forms-either like the arrow-firing apparatus or large one-armed catapults, known in the 4th century CE as the onager or 'Wild Ass' because of its terrific recoil but, in fact, first appearing in the 2nd century CE.
The term catapult was derived from the Greek word katapultos. A catapult was a large machine on wheels with a basket attached to a long wooden arm and a power source for hurling projectiles on the other. The first catapult however was invented around 400 BC in Greek town Syracus.