Do you laugh every time you see someone on television or in the newspapers say how important it is that you get eight hours good sleep a night? They're hilarious, aren't they? We can only assume they've never had children. When your baby is young, they don't operate on your clock; you operate on theirs. That's not ideal when they're seemingly always so full of energy. If the sun comes up at 5 am, you can expect your young children to wake up with it and expect breakfast!
When it's time for them to go to school, though, they get more routine in their lives, and they begin to slow down a little. It's occasionally tempting, as per the depiction in this cartoon, to get your own back for all those long lie-ins you promised yourself you were going to have, but never got chance. Try to keep your evil delight inside your head, though. Wake them up with a smile instead!