It's quite a good exhibit, and there's some education value as each sculpture includes information on the real animal, its habitat etc.
There are twelve sculptures and most are of a high standard (I won't post pictures of them all). The only issue is that the zoo describes the event as follows: "We’re bringing you an incredible collection of BIG CATS to the zoo, made completely out of LEGO® bricks." Most of the species aren't "big cats", but perhaps I'm nitpicking.
Visit while they're still around... although they're strong sculptures - there were adults sitting on some of them - one child took great delight in breaking a few pieces off. Give it a few weeks there'll be nothing left.