Understanding the bullwhip effect is essential for managing modern supply chains, where small fluctuations in consumer demand can lead to amplified distortions upstream. This paper presents the use of the online Beer Game (https://beergame.masystem.se) as an interactive educational tool to simulate and analyze the bullwhip effect. In this web-based version of the game, students take on roles in a four-stage supply chain—retailer, wholesaler, distributor, and manufacturer—each making decisions based on limited local information. The simulation illustrates the impact of lead times, demand variability, and communication gaps on inventory levels and total supply chain costs. Players experience firsthand how uncoordinated decisions lead to excessive stock or shortages, reinforcing the need for information sharing and demand forecasting. The game provides real-time graphical results, supporting post-game analysis and comparison of strategies. This engaging approach effectively supports logistics and operations management education by transforming theoretical concepts into experiential learning.