K: 3 simple stations, teacher-led, focus on trying new things, lots of encouragement
1st: 4 stations, partner support, simple challenges, celebration of effort
2nd: 5 stations, small team support, moderate challenges, problem-solving together
3rd: 6 stations, team collaboration, challenging obstacles, perseverance emphasis
4th: 8+ stations, individual and team challenges, leadership opportunities, advanced problem-solving