There are lots of 'things' that look like great toys for Parrots.
Things that are for decorations are commonly made of stuff that would not normally be placed in ones mouth or design/built to be crewed/worked by a sharp object, a parrot's beak.
The primary concerns are Heavy Metal Toxins, and/or Chemical Toxins.
Also, when items are shipped into First World Nations (now, nearly all Nations), there are specific Import requirements to limit/elimination the transfer of insects, rodents, etc... What chemical killing agents that are used are based on the intended use of the item. Item for general decoration will use a very different chemical than items that Humans and Animals will actively interact/handle/consume.
Now, we know that in their natural settings, parrots will mouth and eat a very wide range of stuff and with few exceptions 'other than' being fast tracked thru, will not affect the parrot. However, in our World of complex chemicals mixed in blends not common in 'natural settings' we need to limit/eliminate their and our exposure to these Toxins!
Its not that we want to take the fun out of playing with neat stuff. We want to assure that what they and our children are playing with is 'Long Term Safe' for them. Hence, unless you know, for sure, its better to walk away. How, if you want to place the effort into back-grounding a specific item to assure what was used to manufacture it, package it, ship control it. And, after that find that its safe. Hey, go for it.
DYI: Many parrot owners will take from what they see and build their own parrot safe version.