A new London museum is always cause for celebration, so make for West India Docks this Saturday. You'll find a free day of outdoor family events at the Museum In Docklands Grand Opening Party. Boats of all shapes and sizes will be on the water, and there's a prize for the best-dressed pirate - so get creative with your child's costume. Expect a musical extravaganza, including a dragon dance winding its way along the waterfront, a brass band, a jazz set, African drums and a gospel choir finale. The Museum itself is dedicated to the Thames and the river's role in the rise of the capital.