DD1 is just two and has always gone down okay for naps. She knows she's tired and accepts it. Recently she's taken to sometimes standing in her cot at nap time and just shouting for us. She's not upset. Just shouting 'mummy!!' to get me to go through. Sometimes she doesn't shout but it's obvious she's awake. How long should I be leaving her to hope she goes to sleep? Normally she does but I wondered whether there's a cut off for 'if she's not asleep now she probably won't nap'?