K: 8 defenders, very soft foam balls, large castle area, focus on fun throwing
1st: 7 defenders, soft foam balls, simple strategy discussion, shorter game time
2nd: 5-6 defenders, foam balls, team strategy development, longer game time
3rd: 4 defenders, medium density balls, advanced strategy, competitive scoring
4th: 3 defenders, various ball types, complex strategies, tournament play with student referees