When children reach the teenage years, or even early adulthood, very often they long for things that they had when they were very young. These things give them certainty, particularly during the period of their lives when they are most insecure. As your child sees herself changing both physically and mentally, it can be very difficult for her to manage, so she thinks back to things that have comforted her in the past and which made her feel happy and secure.
These could be things like an old cuddly toy, a blanket, a special chair, or her favourite doll. If it is your son, it could be an old toy car or plane. But whatever it is, you as a Father must resist the temptation to stop her having this comfort item. Of course you won’t do it deliberately, but try to avoid making her feel that she is weak or inadequate in some way, for needing something she had as a Toddler. Remember this gives her certainty during a time when she is at her most vulnerable psychologically and also adapting to her changing physical appearance.
Her childhood is changing, the old times as a little child are becoming more distant, everything is in a state of flux. The nature of her relationship with you and her mother is different now, not to mention those with her friends and potential new boyfriends or if you have a son, girlfriends. So if an old cuddly toy, or special chair, or even an old bed can make your child feel better about herself, don’t discourage it. In fact be really supportive and even actively try to help her find what she is looking for. She will thank you for being so understanding, although, as a teenager, she may not want to admit it quite yet….