Cuddly toys , pencils , rubbers , notebooks, ANYTHING they can out their name on !
There does not appear to be a name for it.
Quodophile.
Phonographer.
Weird
Some of the names given for a person who collects trains:model train collectormodel train enthusiasttrain modeler
Someone who collects everything would be called a hoarder - this type of person may have OCD as well.
That's an entomologist.
Gun-collector
usher
The person who studing about the shell is calles as chonchologist.
simple - eraser collector!