play around for in bed before he/she falls asleep?
DS is sooo tired after he eats and i rock him for a bit then i lay him down and he gets up, walks around, talks, rolls around for a while..he is happy but just winding down and getting himself to sleep...but sometimes this will go on for 20-30 minutes...anyone else?

Re: how long do you let LO
Yep, DS does this all the time. Sometimes for quite awhile too.
His bedtime "routine" includes at least half an hour of play every night, unless he is dead tired. Usually we bathe him, lotion, clothes, play, bottle, crib. If he's not getting a bath we just start at clothes.
We do try and limit the amount of noisy toys at night though, we tend to stick with practicing skills (walking and standing now) and silent toys like stuffed animals and/or books. B's the type that needs wind-down time, if we tried to put him in the crib without it (like we stupidly did when he was younger) he just screams bloody murder for an hour (no matter how present we are).
Mes Petit Choux
I can't go back to yesterday - because I was a different person then. ~ Alice
This. She is 99% of the time asleep by 10 minutes.
This is what I do with DD