Coin collectors rejoice. $100 million in rare coins and “Funny Money” will be on display, and you can find out what that unusual coin gathering dust in your home might be worth. Activities include a live auction, lectures and seminars and rare treasures from private collections. The hours vary day-to-day: Thursday (9:30 a.m. to 6 p.m.), Friday (10 a.m. to 6 p.m.), Saturday (10 a.m. to 4 p.m., with free admission).