I know my kids are ready for bed by 7 as I just know lol.. they all have their own little signs. for eg Ds1 rubs one eye constantly when he is tired.. Plus my kids are up by 6 EVERY morning regardless of what time they go to bed. The odd time they go to bed around 10 for example they are usually up at 5:30.

so yeh we are flexible like tonight for example. Dd asked to go to bed at 6:30 and boys sat up with my mum watching tv till 7:30.. They put up a fight about going to bed but all 3 were out like lights at 7:45..