I want to be a big boy!

Our little man is growing up... he is about to turn 3 years old in Jan. and he still sleeps in his crib and loves his crib... however last Sunday he asked to sleep on the floor "like a big boy" (the kids at his school take naps on the floor). So we laid his mattress on the floor and shut the door... he came out once and said he needed to go the rest room so we let him go and then told him if you get up again we will have to put you back in your crib... he never moved and I went and checked on him 5 minutes later and this is what I found... a sleeping little man.
Now this was the first and last time he has done this... he did very well and when he woke up he came out of his room and played but that night we tried it again and he got up 4 times... on the last time I told him you get up again you are going back in your crib... and he did... everyday we have given him the choice of sleeping on the floor or the crib and he likes his crib..... as one of my friends says he might not be "emotionally" ready for a big boy bed... so we will continue to wait... but I am proud that he took a nap on the floor for the first time... we soon will probably be moving into a big boy bed... oh how fast they grow up...