The Croods is quite good, won't go down as a classic or anything but has some decent moments and a funny running gag about the mother in law. I had no idea who was doing any of the voices beforehand so got a couple of surprises.
I couldn't decide between Olympus has fallen and IM3 so just watched a cheap horror I got from Tesco called Underground. It was the best of a bad bunch, but my expectations weren't high when I got a set of 3 horror films together for £3.