I put my daughter in time out in her room when she starts shrieking excessively or throwing tantrums. She calms down pretty quickly, which is good. She starts playing with her toys or takes a nap, and seems to not care about being shut in her room after about thirty seconds. This is my dilemma: Do I need to find a new way to discipline her? Should I be happy that she is happy to just play in her room? Should I go and get after the time has elapsed if she is happily playing or sleeping, or should I just let her be?