Evan has this "mission"...
he has a passion of building these blocks and making sure they are as high as he can reach (he can balance all the blocks even though it can be pretty shaky at the bottom of the blocks). Whenever he builds one, and when they fall halfway, he will give a cry and then whine while picking up all the pieces and start all over again till its completed!
Its so tall, till none of us dared to disturb them :|*