The Hyatt Regency Cambridge on the Charles River overlooking the Boston skyline between Boston and Cambridge welcomes you with a Family Fun package until Dec. 30, 2007. The weekend family fun package includes a deluxe guest room with Hyatt’s signature “grand bed”, 50 percent off the hotel’s prevailing rate of the day on a second room (adjoining or connecting) for children when available, American breakfast buffet for four in Zephyr on the Charles, kid’s welcome gift bag per child, seasonal bicycle rentals, complimentary in-room movie, including assorted snacks and dips with sodas for a family of four, complimentary validated self-parking and complimentary shuttle service to select destinations within Cambridge. You’ll also have full access to the health club including a glass-enclosed heated pool with rooftop sundeck, exercise equipment, whirlpool, sauna and steam. The package starts at $225 per night.