Do you think you know the San Francisco 49ers better than anyone else?  Here's your chance to prove it with the San Francisco 49ers Trivia Challenge.  Each trivia card contains 5 questions about the San Francisco 49ers.  If a player answers a question correctly, they get to keep the card.  The player with the most cards at the end wins.  Includes 50 trivia cards with 250 team-specific questions.  Recommended for ages 12 and up.