Harrison has finally outgrown the destructive phase and is into building and creating. Jefferson on the other hand still finds great pleasure in destroying block towers and train tracks.
Which is exactly what was happening when Harrison sat wide eyed as his tornado of a brother whittled down the stacks and towers he had just finished building. Jefferson giddily shrieked with each explosion and to finish it off, launched each block across the room with his own sound effects.
A solemn Harrison who had just sat there observing his linebacker brother enjoy every minute of his destructive play looked up at me and very seriously said, "I'm pretty sure Jeff wants to destroy the world, but don't worry, I'll stop him."