Grant museum in London?

[hardbeingme]

Has anyone been, is it dc friendly? The place looks fascinating but will I be rewarded with bored children and annoyed curators?
DCs are 4,4 and 5, bright (if I do say so myself ) and really like the natural history museum. Their attention span can be awful if they're not interested though...
TIA

It's a brilliant place for dcs of all ages for a couple of hours, quite small but full of fascinating exhibits and lots of hands on stuff