At what age would you trust your kids in bunks? My twins are three and my oldest will be four in November. They are getting pretty tall but the only way to get them into twin beds is to make a triple bunk. We have very small rooms. I just have nightmares of them jumping from level to level and being awful. Our transition to toddler beds was a nightmare of destruction and I am a little gun shy at this point but they are starting to outgrow the toddler beds.