Complex sentence: Edmund makes cruel and hurtful comments to Lucy when she first finds the entrance to Narnia through the wardrobe, and is the second of the Pevensie children to go to Narnia, after following Lucy to tease her during a game of hide and seek.
Split into simpler sentences: Edmund makes cruel and hurtful comments to Lucy when she first discovers the entrance to Narnia through the wardrobe. He ends up being the second of the Pevensie children to enter Narnia, after following Lucy to tease her during a game of hide and seek.