Ahhh yes, the 'transition'.
If you really feel your little one is too small to be out of his crib, you can invest in a crib tent. They're about $50 online, or $70 at Babies R Us if you have to make an emergency "I need one NOW I don't have time to order one online" trip. These crib tents are designed to keep kids (and pacifiers

) in, and keep unwanted guests, like pets, out.
Over Christmas, at my parents house, our little guy (who's quite a climber) decided to escape his Pack N Play. When we got home, he was climbing out of his full-size crib, and I was afraid he was going to get hurt. He's just too small for a regular bed yet, even though he is now 2. We want him to stay put for a while. We made the trip to BRU the next day and spent the $70. It took 2 nights for him to get used to it, but he's fine with it now.
Our older son was happy as could be in his crib. Never tried to climb out, and was comfy & content. We only switched him to a bed because Bill's sister was ready to give us their Little Tikes race car bed, and he was getting almost too tall for the crib! He was one month past his 3rd birthday when we made his switch. We set up the bed, and he had a grand time playing on it. When bedtime came around, he was really confused and wasn't really 'getting it', that he was supposed to sleep there! Poor thing curled up crying on the floor by his CD player, listening to the music we played for him at night. We took the CD player, put it at the head of the bed, and voila! He crawled into the bed, we put the covers on him, and he went to sleep. No problems since!
We put a KidCo walk-through gate at his door, so he couldn't escape his room. He could open the door, but not get out. He now knows how to operate the gate, but we leave it there because the latch makes a nice loud 'click', so we can hear him if he's leaving his room. He's really really good about staying in his room though, and the only time he ever leaves is in the morning when he's ready to get up. The gate will come down soon, but for now we like the audible warning that he's leaving!
As for our 2 year old, he's staying in his crib! I think it's really very individual as to when to take them out. Some kids get really cranky and unhappy in their cribs, if that happens, just switch them. Put a baby gate at their door so they can't escape, and the first few nights can be tough. Just keep putting them back in bed if they get out (and they will!). With consistancy and time, they'll figure it out
