Same here, feels like a pretty normal trait, both my kids have this with their favorite toys (I had the same as well) and nowadays I do have attachment to some of my stuff, specially my kitchen utensils/devices, my kitchen aid mixer (10 years old now) even has a name.

From the summary it feels like the problem is more related to the fact they have more distressing events, I don't think i've had any recently but i can think of one or two when i was a kid and lot favorite toys.