One of the often overlooked one is moving a child from a crib to the bed. The question usually involves kids about two years old. And for children, there's not always a simple answer. You have to read your own child and take little steps with those children who appear to be most fearful and resistant. The transition should be slow and careful.
Some cribs come with a removable side and become a small junior bed.
Young children often like these at first because three of four surrounding walls are familiar. You can, however, continue to acquaint him with a bed. A removable side rail at first is an option just in case he needs more time to adjust to the lack of firm surroundings. It's also best to have carpeting under the bed just in case he takes a tumble in the night. If you are contemplating a move or if your family is experiencing a significant amount of stress, it's probably best to wait until things calm down.