Agree with Onyx - it is really hard to build something like that as they tend to form attachments to the weirdest things at times! DS has had a teddy since he was around 1 - he chose it and we replaced the original one with one that we have been able to replace regularly at Toys R Us as it's one of their branded teddies. DD has her puppy that she's had since birth but she also rotates through various things depending on her mood and she's nearly 5. I don't think you need to consciously try and build that security as you will find as he gets older he will probably choose his own things - having said that, some kids don't have any! Just depends on the child.