Brighton Museum & Art Gallery has been a staple visiting point for years. When my son was born, it offered free entertainment, changing facilities, and a cafe. It's still a great place to wander round. These days I pay more attention to the small detail though - there's some fascinating stuff there.
Mugs adorned with freemasonry symbols:
Two Dogs Heads staring into your future:
A jug celebrating the guillotine. "View of LA GUILLOTINE or the modern beheading machine at PARIS by which LOUIS XVI late king of France suffered on the Scaffold Jan 21 1793".
I couldn't get a good picture of the chamber pot with Napoleon's head in, so here's a better version taken from Peter Kenny's blogpost: