I'm afraid this will be a waste of money, but how long can a child sleep in a crib? My 2.5 year old has never tried to climb out of his yet, and I'm afraid that if he isn't in a crib, he'll just run around all night and not sleep! He already fights bedtime, and cries for his toys. He's very strong willed, so I'm afraid to see what will happen if he can freely move around. My baby is almost 5 months old, so he really needs a crib. Should I buy a second one for him? Or should I suck it up and move my toddler into a big boy bed?