Ready for bed!

How do you know when your child is ready for bed?

Mine snuggles up on the couch and falls asleep :)

then after I carry all 70 something pounds of him up stairs to go potty and get him into bed.  Then what does that sleepy boy do?  He goes to the bathroom, goes back downstairs and falls back to sleep on the couch.  After searching all over upstairs for him I went down stairs and wasn't as nice this time...  I woke him up and made him walk up to his room to go to bed :( 

His reply to me ...  Mommy I'm bushed!

I love him...funny little boy.