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.
Definition: The ballista is a type of siege engine and catapault that revolutionized warfare. It was used first in 398 B.C. in the successful siege of Motya, a Phoenician city in western Sicily, by Dionysius I, tyrant of Syracuse.