The East London Museum was established in 1921 and features a number of different exhibits, most famously the type specimen of the coelacanth, a fish which was believed to be extinct.
You can spend a lovely few hours wondering around the museum, taking in all the exhibits. The museum has on a display a specimen of a dodo egg, while the original (and last remaining dodo egg) is kept safely locked away.
Upstairs you can find a living beehive, which the kids always find very fascinating. You can also find the oldest human trace fossil, 124 000 year old footprints.
There are plenty of interesting exhibits and a lot to learn.