He hung my little sister's baby doll from the curtain rod, along with her hippo named Ralph. He threatened to take Ralph to America and blog about Ralph's adventures in the U.S. He hid baby Sarah's teddy bear that she sleeps with every night till she she was nearly in tears because she couldn't find it. He taped my Mom's Korean drama DVD to the ceiling of her bedroom. He constantly took panorama pictures of everybody, whether we wanted our picture taken or not.
But my sisters know very well what to do with a strong older brother:
Use him at the base for a four person stack in the pool. (p.s. I love the "Adults must accompany children" sign in the background)