Ds2 is just 3. He wakes any time between 5.30 and 6.30, like his brother. Always have, always will. If their sister (almost 5) were in complete isolation whe would sleep 'til at least 8 but that hasn't happened in years.
Ds2 takes himself to the loo, but then wants to play. I have to listen for him every morning and get up and escort him back to his room, which, without fail, causes a scene. Occasionally he will stay in his room, but more normally he'l yell for a while and then break free again. Often I have got up and started my day by then but am not ready for any of them to.
He's typical 3rd child, headstrong and knows what he wants (he has to) and bribery wouldn't work, nor clocks which wake up etc. he knows it's not time to get up but he doesn't care.