We found this site at Toad Haven. fun online TREBUCHET game
Then we tried it for ourselves
Until we broke the board:(
From Wikipedia, the free encyclopedia: A trebuchet[1] or trebucket[2] (from the French: trébuchet) is a siege engine that was employed in the Middle Ages either to smash masonry walls or to lob projectiles over them and into the castle under siege. It is sometimes called a "counterweight trebuchet" or "counterpoise trebuchet" in order to distinguish it from an earlier weapon that has come to be called the "traction trebuchet", the original version with pulling men instead of a counterweight. Manpowered trebuchets appeared in the Greek world and China in about the 4th century BC.
The counterweight trebuchet appeared in both Christian and Muslim lands around the Mediterranean in the twelfth century. It could fling up to three-hundred and fifty pound (140 kg) projectiles at high speeds into enemy fortifications. Occasionally, disease-infected corpses were flung into cities in an attempt to infect or terrorize the people under siege—a medieval form of biological warfare.
The trebuchet did not become obsolete until the 16th century, well after the introduction of gunpowder. Trebuchets were far more accurate than other medieval catapults.