We gave you a heads up last week but here's a big reminder - the Museum in Docklands is having a 5th birthday party this weekend, flinging open its waterside doors and welcoming all, waiving its entrance fee.
The Museum is lesser known than its big sister, the Museum of London with pride of place on London Wall since 1975, but the converted warehouse at West India Quay brings the importance of the river and London's history as a port into focus, with 70% of the collection formed of the archive of the Port of London Authority. This stuff is brilliantly brought to life in the permanent exhiition, exploring the development of the Docklands and the stories of the people who shaped it.
Speaking of which, birthday events include the Museum's first Director, Chris Ellmers will be giving talks about the history of the Museum itself and you can catch some rare film footage of Londoners during and after World War 2 dug out from the London Screen Archives.
The special exhibition at the moment, is - of course - all about Jack the Ripper so while you're enjoying the freebies, you might want to consider spending the eminently reasonable entrance fee of £7 and checking out the East End's goriest, most notorious and persistent serial murdering legend.
Then on Sunday, it's kids day with historical characters brought to life, stories, music, dancing, dressing up, singing and all that jazz.
By the way, if it's your first time and you don't know your way around, don't trust the signage from Canary Wharf station as it stops somewhat suddenly. Head for Cabot Square then cross over Wren Landing.