We moved DD1 into a new room and bed at 26mos when expecting DD2. She handled it just fine. We bought a twin mattress/box spring and started with just the mattress on the floor. She could climb in/out easy and we didn't have to worry about her rolling off. After a week or two we put it up on the box spring with a pool noodle as a bumper. A few weeks after that we put the whole thing on the bed frame and kept using the pool noodle. For $1 it's the best bed rail there is. We started the transition about 4mos before baby's arrival thinking we'd need the time for transition. And honestly she took to it the first day with no concerns. She never indicated she was upset about losing the crib or the other bedroom.
Mom to two amazing DDs ('07 & '09) and a fur baby.
Gluten free since Nov '11 after non-celiac gluten sensitive diagnosis. Have had great improvement or total elimination of: migraines, bloating/distention, heartburn, cystic acne, canker sores, bleeding gums, eczema on elbows, dry skin and scalp, muscle cramps, PMS, hair loss, heart palpitations, fatigue. I'm amazed.