my dd1 attached herself to andy pandy at around 15 months, and he was surgically attached to her for the next three years or so 1
he is in every photo we have of her from that age on, and had to go to nursery and ballet with her, it was a complete addiction. She was a shy clingy child, and I guess he gave her comfort and reassurance when she was unsure of things.
She is 6 next month, and he still goes to bed with her every night, but happily he stays at home most days now, (probably due to the few scary times we nearly lost him !)
He is so adored even now, I truly think she will never get rid of him. But I think its lovely, he helped her through her shy times, and she is now a very confident, chatty outgoing girl, so I don't regret letting her cling to him when she needed to.
Dd2 is 4 now, and has never had a favourite comfort toy, she just flits from toy to toy. So I guess every child is different !
I must admit I put ds (15 mo) to bed every night with a lovely cuddly elephant, hoping he'll get attached ! I know I'm asking for trouble .