In the picture there's the progress of the construction of the catapult at the workshop.

During 2 days and about 4 hours students organized in groups of 4 built their own Roman catapult. When they finished there was a final game with 2 competitions: throwing marble to the longest distance and throwing them with precision inside a target. 

Students used this list of new vocabulary to understand themselves and paper instructions like this to build the catapult. 

The winner team won an Erasmus keychain for each participant. If you click at the image you'll watch a video of the marbles competition: