Help! My 3 year is a nightmare at bedtime. She constantly gets back out of bed. She wanders the house. She goes in her sisters room and plays with toys. Tonight she's gone and got a pen from her sisters room and drawn all over her drawers. I tell her off and tell her not to do it and she smiles at me. I take treats away and she doesn't care. She's not interested in stickers or rewards she just keeps on doing it. What can I do? A baby gate doesn't work as she's a good climber and can easily climb over.